Cataloging is complete for 31 manuscripts from Mar Petyun Keldani Kilisesi (CHAL), the Chaldean Catholic Church of St. Pethion in Diyarbakır, Turkey. Many of the manuscripts in this collection are account books and registers of baptisms, deaths, and other events that provide detailed archival data on the Chaldean community and its cultural institutions in 19th- and 20th-century Diyarbakır. Other items include devotional, liturgical, apologetic, and theological works.

The collection testifies to the linguistic diversity of southeast Anatolia, including substantial material in Arabic, Ottoman Turkish, and Syriac; one death register (CHAL 00013) also includes a single notice in French regarding a German officer who died in the city during World War I. One particularly significant find (CHAL 00031) is a partial copy of Ibn al-Maḥrūmah's (14th c.) Ḥawāshī (Glosses), an important late medieval Arabic work of Christian-Jewish-Muslim dialogue previously known only from a single example at the Biblioteca Angelica in Rome. View now