Monumental Trees

Monumental trees are natural entities that reach values exceeding the average physiological limits of their species in terms of age, trunk diameter, crown width and height, and are capable of surviving for centuries throughout their natural lifespan, thereby providing continuity between the past, present and future. In addition, individuals associated directly or indirectly with historical events, cultural traditions, beliefs and folkloric values of the regions where they grow are also considered to have monumental tree status.

The TS 13137 “Criteria and Labeling Standard for Monumental Trees Inventory”, prepared by Turkish Standards Institute, defines a monumental tree as: “a tree with a natural lifespan long enough to serve as a bridge between the past and the present, and the present and the future, which reaches values far above the customary measurements of its species in terms of age, trunk diameter, crown width and height, or holds a special place in the regional history, mystical culture and folklore”^【1】.

History and Cultural Significance

The historical background of monumental trees reflects a development parallel to human history. Throughout history, the relationship between humans and nature has been symbolized concretely through the tree figure; the tree has become a universal symbol of life, continuity, fertility and rebirth. From ancient times onward, trees in many civilizations have been regarded not merely as biological entities but as symbols imbued with sacred, spiritual and social values.

From antiquity, in Sumerian, Assyrian, Hittite, Persian, Greek and Roman civilizations, the tree was viewed as the center of the universe, and the concept of the “tree of life” found a place in mythological narratives. In Central Asian cultures, the concept of the “world tree” or “tree of life” emerges as a sacred symbol, positioned at the center connecting the realms of heaven, earth and underworld.

Anatolia civilizations are also representatives of this tradition. During the Hittite, Phrygian and Lydian periods, long-lived trees such as oak and plane were regarded as symbols of sacred sites. Particularly, the plane tree was adopted as a symbol of state power and justice due to its durability and structure. The olive tree has been regarded as sacred since antiquity as an expression of peace, abundance and immortality. These cultural symbols, following the adoption of Islam, acquired mystical and religious meanings and became symbols of “immortality” and “wisdom” in Sufi culture.

During the Ottoman period, the tree retained its significance as a symbolic element of social and political life. The longevity, power and concept of justice of the state were generally expressed through the metaphor of the “plane tree”. Plane trees planted in palace gardens, külliyes, squares and village centers became focal points of community life, used both as shaded resting areas and gathering spaces. Additionally, certain trees, due to their witness status to specific historical events or figures, were regarded by the public as “sacred” or “blessed”. Rituals such as prayer, wish-making or offerings were performed around these trees.

During the Republican era, monumental trees continued to be regarded as part of cultural continuity and natural heritage. The old plane tree in the village square, the oak in the town center or the olive tree in the mosque courtyard are seen by local communities as silent witnesses of social life. Meetings were held, decisions made, and a sense of social solidarity and unity strengthened under the shade of these trees.

The cultural significance of monumental trees has also found a place in art and literature. The image of the tree has been used in poetry, in folk songs, in epics and painting. Poets associated long-lived plane trees with wisdom; olive trees with peace and tranquility; and cypress trees with the concepts of death and eternity.

The Olive Tree, Considered Sacred Since Antiquity as an Expression of Peace, Abundance and Immortality (Anadolu Agency)

Biological and Ecological Characteristics

Monumental trees occupy a prominent place among nature’s remarkable living entities due to their long lifespans, morphological resilience and high ecological adaptability. It is known that they have survived for centuries, and in some species for millennia, resisting environmental changes. These characteristics also make them biological resources essential for the genetic continuity of their species.

Ecologically, monumental trees play a fundamental role in maintaining the balance of their habitats. Through photosynthesis, they absorb carbon dioxide from the atmosphere and produce oxygen, contributing to the sustainability of the carbon cycle. Particularly due to their large trunks and extensive leaf surfaces, these trees have high carbon storage capacity and function as natural “carbon sinks” in mitigating the effects of climate change. Simultaneously, they improve air quality by filtering pollutants, enhance water retention on soil surfaces and prevent erosion.

Their extensive and deep root systems support soil structure and assist in balancing the groundwater cycle. Thanks to these features, monumental trees create a regulating effect on microclimatic conditions in their surroundings. Especially in hot and arid regions, they provide shade, reduce local temperatures, increase humidity and enable the healthy development of surrounding vegetation.

Another factor enhancing the biological importance of monumental trees is their provision of habitat for numerous species. Cavities, fissures and natural hollows formed in trunks and branches serve as shelter, nesting and feeding areas for birds, insects, bats, small mammals and fungal species. Particularly, epiphytic plants, lichens and mosses growing on old trees ensure the continuity of micro-level components of the ecosystem.

From a scientific perspective, monumental trees are among the primary sources for obtaining data on natural history. When the growth rings in tree trunks are examined using dendrochronology (the science of tree rings), precise information about climatic, geological and environmental events of past periods can be obtained. These rings record specific years of droughts, fires, frost events or other natural disasters.

Classification of Monumental Trees

Monumental trees are classified according to specific criteria established by the Turkish Standards Institute (TSE) in the TS 13137 “Criteria and Labeling Standard for Monumental Trees Inventory”, taking into account their morphological, historical, cultural and spiritual characteristics. This standard ensures the objective evaluation of the scientific, cultural and ecological qualities of monumental trees and their systematic recording in inventories.

According to this standard, monumental trees are grouped into four main categories: dimensional monumental trees, historical monument trees, folkloric monumental trees and mystical monumental trees.

• Dimensional Monumental Trees: These encompass individuals whose measurable morphological characteristics—such as age, height, trunk diameter and crown width—exceed the average values of their species by a significant margin. These trees exhibit extraordinary biological development and are resilient specimens that have adapted to environmental conditions throughout their long natural lifespans. Dimensional monumental trees generally reflect the genetic potential and ecological adaptability of their species. To be eligible for registration, their physical criteria are determined by the “Current Monumental Value (CMV)” calculation. The CMV score is the sum of points assigned to the tree’s height, trunk diameter, crown width, age, location and positive attributes. If this value equals or exceeds the predetermined “Minimum Monumental Value (MMV)” score for the respective species, the tree qualifies for registration as a dimensional monumental tree. This system is used to ensure objectivity in assessments and to ground the registration process in scientific principles.

• Historical Monumental Trees: These are trees associated with significant past events, historical figures or social developments of a specific era. For example, trees planted at the site of a battle or known to have provided shade for a particular state official fall into this category. Historical monumental trees are regarded as living entities possessing documentary value. Therefore, any tree whose historical connection is verified is recognized as monumental regardless of its age or physical size.

• Folkloric Monumental Trees: These are trees integrated into local traditions, customs, legends and oral narratives, holding a special place in collective memory. Sometimes these trees have witnessed joyful or sorrowful events in the community; at other times, they have been attributed sacredness according to local beliefs. For instance, trees under which children in a village are named or around which social events such as weddings and ceremonies take place possess folkloric characteristics. Such trees are tangible cultural heritage elements that sustain local culture and are directly recognized as monumental trees without regard to age, height or species.

• Mystical Monumental Trees: These are trees associated with religious beliefs, spiritual values or popular beliefs attributing sanctity to them. These trees are typically found near mosques, tombs, tekkes or other sites regarded as sacred and are perceived by the local population as holy entities. Religious rituals such as making wishes, tying cloth offerings, praying or making vows are performed around these trees.

For a tree to be registered as monumental, it must meet at least one of the four categories mentioned above. Trees possessing cultural (historical, folkloric or mystical) attributes are registered as monumental trees regardless of their species or physical characteristics. In contrast, trees exhibiting only dimensional features undergo a scientific evaluation prior to registration, with the CMV-MMV scoring system applied. This evaluation is conducted based on the objective criteria specified in the TSE standard.

Prominent Monumental Trees in Türkiye

Türkiye is one of the world’s significant natural heritage areas due to its geomorphological structure, climatic diversity, biogeographical position and vegetation cover. The Anatolian region, situated at the intersection of different climate zones, offers ecological conditions favorable for the growth of a wide variety of tree species. This natural richness has enabled the existence of monumental trees across the country that have survived for centuries, even millennia, possessing high historical, cultural and ecological value. These trees throughout Türkiye constitute not only biological entities but also integral components of social memory in historical and cultural terms.

According to the most recent data from the Ministry of Environment, Urbanization and Climate Change, there are currently 9,369 registered monumental trees across Türkiye. These trees are classified as “natural heritage” for the purpose of both natural and cultural heritage's conservation and are recorded in inventories by the General Directorate of Nature Conservation. Registered monumental trees are found in nearly every region of the country, but are particularly concentrated in the Mediterranean, Aegean, Black Sea and Marmara regions.

One of the country’s notable monumental trees is the yew tree (Taxus baccata) located in Alaplı district of Zonguldak province. Estimated to be 4,117 years old, this tree is recognized as one of the five oldest trees in the world. Dating back to the Bronze Age, it holds both scientific and cultural significance and is internationally acknowledged as a natural heritage example embodying “living history”.

The 4,117-Year-Old Yew Tree Located in Alaplı District of Zonguldak Province (Anadolu Agency)

Another example is the cedar tree (Cedrus libani) known locally as “Ambar Katran” within the boundaries of Kumluca district in Antalya province. This individual, approximately 2,327 years old, stands 25 meters tall with a trunk diameter of 262 centimeters, drawing attention through its structure and longevity. Locally, its wide trunk led to it being called “tree like a granary,” a name that eventually became permanently established as “Ambar Katran.” In the same region, in Elmalı district, the 1,701-year-old “Fetid Juniper” (Juniperus foetidissima) is also protected as one of Türkiye’s oldest junipers.

The Musa Çınarı in Samandağ district of Hatay province is one of Anatolia’s best-known mystical monumental trees. According to local belief, this tree sprouted when the Prophet Moses planted his staff in the ground. This plane tree, thought to be over 2,000 years old, is regarded as sacred by the local population due to its religious and folkloric attributes. In the same province, in Payas district, a 1,351-year-old olive tree (Olea europaea) located in the courtyard of the II. Selim Külliyesi was registered as a monumental tree in 1976 and continues to bear fruit.

The 1,501-year-old olive tree within the boundaries of the Lagina Ancient City in Yatağan district of Muğla province holds a special position both historically and archaeologically. This tree is seen as a symbol of a continuous life cycle stretching from antiquity to the present in a region that was once one of the centers of pagan belief. Additionally, the plane tree in Cumhuriyet Square in Ağlasun district of Burdur, which has become a symbol of the local community, and the cedar tree at the entrance of Karanlıkdere Canyon in Altınyayla district are other notable examples distinguished by their structures.

The 1,146-year-old pedunculate oak (Quercus robur) in Sekiören village of Kütahya province is one of the oldest oaks registered in Türkiye’s inland regions. This 20-meter-tall tree, with a trunk diameter of 201 centimeters and wide branches, draws attention and forms an important ecological area for wildlife in its surroundings. The 1,147-year-old plane tree in Palu district of Elazığ province, along with three other small old plane trees in the region, forms a natural monumental group.

The 1,146-Year-Old Pedunculate Oak in Sekiören Village, Kütahya Province (Anadolu Agency)

In addition, numerous olive trees registered in Akçakale (Şanlıurfa), Kırkağaç (Manisa) and Mut (Mersin) districts; the juniper in Taşağıl (Konya), the plane tree in Onikişubat (Kahramanmaraş), and the monumental plane trees in Sarıyer (İstanbul) represent other protected examples across different regions of the country. These trees are tangible natural heritage elements representing the historical, cultural and natural identity of their respective regions.

Monumental Trees of Türkiye (Anadolu Agency)

Conservation of Monumental Trees in Türkiye

The conservation of monumental trees in Türkiye is a process based on legal, administrative and scientific principles, carried out by the General Directorate of Nature Conservation under the Ministry of Environment, Urbanization and Climate Change. The identification, registration, protection, maintenance and monitoring of monumental trees are addressed within the framework of environmental policies, cultural heritage protection principles and scientific standards.

The legal basis for the conservation of monumental trees is the “Regulation on Procedures and Principles for the Determination, Registration and Approval of Protected Areas,” published in the Official Gazette No. 28358 on 19 July 2012. This regulation was issued under Article 13/A of the Decree-Law No. 644 on the Organization and Duties of the Ministry of Environment and Urbanization and regulates procedures and principles for the protection of natural heritage. According to this regulation, the identification and registration of monumental trees fall within the authority and responsibilities of the General Directorate of Nature Conservation.

The registration process for monumental trees is carried out through a multi-stage administrative and scientific procedure. First, a scientific evaluation is conducted to determine whether a tree qualifies as monumental. This evaluation follows the criteria established in the Turkish Standards Institute’s TS 13137 “Criteria and Labeling Standard for Monumental Trees Inventory”.

For a tree to be registered as monumental, its Current Monumental Value (CMV) score must equal or exceed the predetermined Minimum Monumental Value (MMV) score for its species. The CMV score is calculated as the sum of points assigned to the tree’s height, trunk diameter, crown width, age, location and positive attributes. Based on the evaluation results, decisions regarding eligible trees are made by the Regional Nature Conservation Commissions. The commission’s decision is submitted to the Minister of Environment, Urbanization and Climate Change for approval, and registration is formally completed upon ministerial endorsement.

Once registered, monumental trees acquire “natural heritage” status, and all procedures related to their protection and maintenance are carried out under the ministry’s supervision. A protection zone is established around each monumental tree, and necessary measures are taken to prevent environmental damage. Activities such as construction, excavation or chemical use in the vicinity are restricted; and when deemed necessary, technical interventions such as rehabilitation, pruning, structural support and soil improvement are applied.

The maintenance, monitoring and surveillance activities conducted by the ministry are scientifically intensive processes involving contributions from forestry engineers, biologists and ecology experts. Additionally, the condition of registered monumental trees is regularly inspected, and protection plans are updated when life-threatening conditions are identified.

Another aspect of monumental tree conservation in Türkiye is raising public awareness. The sustainability of the conservation process depends on public consciousness. In this context, the ministry has established a national inventory system to collect data on monumental trees. This system provides the public with information on the age, species, location, registration date and photographs of all registered monumental trees across Türkiye.

The conservation of monumental trees also encompasses the protection of natural heritage. Activities undertaken in this regard are aligned with international agreements to which Türkiye is a party. In particular, the Convention on Biological Diversity (1992), the European Landscape Convention (2000) and the Bern Convention (1979) establish general principles for the protection of natural and cultural landscape elements and serve as legal foundations for the conservation of monumental trees.

Conservation, Inventory and Awareness Initiatives

The conservation of monumental trees is not limited to registration and legal status but encompasses scientific research, systematic documentation, continuous monitoring and public awareness creation. In Türkiye, inventory work on monumental trees is coordinated by the General Directorate of Nature Conservation, with contributions from regional directorates, universities and related institutions. Within this framework, information on each tree—including species, age, height, trunk and crown diameter, location, ecological characteristics and, where applicable, historical-cultural context—is compiled to establish a national Monumental Tree Information System. This system serves as a fundamental database for both scientific research and administrative decision-making.

One dimension of conservation efforts involves monitoring tree health and implementing maintenance practices. Regular periodic inspections are conducted on elderly or physically damaged monumental trees, and technical interventions such as restoration, pruning, trunk support or root zone management are applied as needed. Additionally, protection boundaries are established around each monumental tree, and safety measures are taken to prevent construction, soil compaction or human-caused damage.

The sustainable conservation of monumental trees also depends on public awareness. Therefore, various awareness and educational initiatives organized by local administrations, universities and civil society organizations serve as complementary elements of conservation policies. These activities include nature education programs for children and youth, environmental workshops, documentary productions, photographic exhibitions and thematic walking tours.

Furthermore, monumental trees are also considered in terms of tourism and environmental education. In some regions, eco-tourism routes and information areas have been developed around registered monumental trees to enhance the economic and cultural contributions of local communities.

Continuity in inventory work is crucial in the conservation process. The identification of new trees for registration, the updating of existing records and the monitoring of damaged individuals require systematic and ongoing efforts.