This article was automatically translated from the original Turkish version.
Ali Kuşçu, a distinguished scholar, mathematician, and observer who lived in the 15th century and is regarded as one of the founders of astronomical instruction in Ottoman. He is commonly known by the epithet "Kuşçu" because he was born in Samarkand and his father served as the kuşçubaşısı (chief falconer) of Ulugh Beg.
Representation of Ali Kuşçu (generated by AI)
After the death of Ulugh Beg, the scholarly environment in Samarkand weakened, prompting Ali Kuşçu to first move to Tabriz and then to the court of the Akkoyunlu ruler Uzun Hasan. However, what distinguished him in the history of science was his arrival in Ottoman lands at the invitation of Fatih Sultan Mehmed. Fatih’s personal reception of Ali Kuşçu was a clear indication of the value placed on knowledge during that era. The Sultan provided him with both material and spiritual support and established a specialized faculty for astronomical instruction at the Ayasofya Medresesi. Thus, for the first time in the Ottoman Empire, astronomy became an independent field of study. Ali Kuşçu’s arrival in Istanbul was not merely the migration of a scholar but a turning point that redirected the course of Ottoman scientific tradition.
Ali Kuşçu’s most important astronomical work is el-Fethiyye fi’l-Hey’e. Expanding upon his earlier Persian treatise Risâle der Heyʾe, he wrote this work in Arabic and provided comprehensive information on the motions of celestial bodies, the positions of stars, planetary orbits, and spherical trigonometric calculations. While adhering to the geometric model of the classical Ptolemaic system, he reinterpreted it using observational data. Furthermore, in his treatise Fâide fî Eşkâli Utarid, he critically examined and corrected certain errors in Ptolemy’s model of Mercury, making a significant contribution. In this regard, Kuşçu was a pioneer in introducing the tradition of critical observation to the Ottoman world.
During his time in Istanbul, Ali Kuşçu was not only a teacher but also an effective transmitter and institutionalizer of science. In addition to his duties at Ayasofya Medresesi, he collaborated with Molla Hüsrev to design the curriculum (nizamname) of the Sahn-ı Seman Medreseleri. In mathematics, his most renowned work is the er-Risâletü’l-Muhammediyye fi’l-Hisâb, written in honor of Fatih and taught for a long time. In the fields of theology and logic, he also made an impact through his commentary Şerhu’t-Tecrîd on the work of Nasir al-Din al-Tusi.
The Samarkand legacy he brought to the Ottoman Empire was not limited to theoretical knowledge; the tradition of instrument-making and observational techniques was also transmitted to Istanbul through him. In this sense, Ali Kuşçu played the role of a bridge in the transition of Islamic astronomy from East to West.
Today, in the literature of the history of science, this transfer of knowledge he initiated is referred to as the “second Samarkand influence.”
Ali Kuşçu died in December 16, 1474 in Istanbul. After his death, his students and works played a decisive role in institutionalizing scientific astronomy in the Ottoman Empire and shaped the content of courses taught in observatories and medreses. Ali Kuşçu’s legacy continues to remind us of the boundless nature of knowledge and the role of scientists as cultural bridges.
Fatih’s Invitation and a Scientific Journey to Istanbul
A Critical and Innovative Perspective in His Works
Institutionalization of Astronomy in the Ottoman Empire
A Scientific Tradition Transferred from Samarkand to the Ottoman Empire
His Legacy and Final Years