Mor Aho Monastery is a religious structure located in the Banı Mahar countryside, approximately 2 kilometers north of Üçyol village in the Hasankeyf district of Batman Province, Türkiye. It dates back to the era of early Syriac Christian presence in Hasankeyf. Locally, the structure is also known as Deyr Mahar, which means “Mahar Church.” Although no inscription survives to determine its exact date of construction, architectural features and local oral traditions suggest that the monastery reflects characteristics of early Syriac monastic architecture.

^{Mor Aho Monastery (Türkiye Kültür Portalı)}

Location and Physical Features

The monastery was built on a plateau dominating the Tigris River, situated about 150 meters above the river level. It lies approximately 10 kilometers east of the Hasankeyf town center and is surrounded by agricultural land, with no nearby residential settlements. The structure is rectangular in plan, measuring approximately 20 by 30 meters and covering an area of around 600 square meters.

Architectural Features and Materials

There is no inscription available that provides a precise date of construction. The structure was built using local materials, including ashlar stone, rubble stone, and ces (slaked lime mortar). Within the monastery courtyard, there is a water well. Near the banks of the Tigris River lies a fruit orchard locally known as the Attafiye Gardens, which is believed to have been part of the monastery's property. The presence of ruined historical structures within the garden strongly supports this connection.

Historical Development and Conservation Status

Over time, as the local Syriac Christian community abandoned the area, the monastery was left unattended and gradually fell into a state of ruin due to neglect. The structure has suffered significant damage from natural conditions, including the collapse of several walls. However, no evidence of human-induced destruction has been identified. Today, Mor Aho Monastery is officially registered and protected by the Ministry of Culture and Tourism of Türkiye. It has undergone partial restoration to preserve its architectural integrity.