Cataloging is now complete for the collection of the Armenian Patriarchate of Istanbul, Ortakoy (HMML project code APIO). This collection of 134 manuscripts primarily contains works in Armenian, though several manuscripts are comprised of writings in Armeno-Turkish (Turkish language in Armenian script). The collection contains a wide variety of works, including liturgical and biblical materials, patristic works, theological and philosophical works from the Armenian heritage, and several modern European works translated into Armenian.

Highlights of this collection include a copy of the Armenian prayer book known as the Aghōtʻagirkʻ dated to 1381 CE (APIO 00152), and a two-volume commentary on the biblical book of Sirach that totals over 1900 pages, written by an 18th century Armenian Patriarch named Yakob Nalean (found in APIO 00157 and APIO 00158). The opening page of this work contains a color illustration of the author praying for wisdom. View now