In 1617-1618, in the area of the north-eastern citadel the religious-educational complex (Kyliye) of Aslan Pasha was built which included the mosque, the Madrassa (seminary) and the Mageiria (hearth).

It constitutes one of the most important mosques of Ioannina. It was probably built on the site of the Byzantine church of Saint Ioannis. The Aslan Pasha Mosque today, (18, Al. Noutsou street), functions as a Municipal Ethnographic Museum and houses three collections, representative of the three communities of the city, the Christian, the Jewish and the Muslim. The items are donations from prominent families, dating back from the 18th – 20th centuries and are equipment with a useful and decorative character made of various metals or porcelain, too. Someone can also observe weapons and clothing, typical of the Ottoman rule period.

The objects of the Christian collection also include ecclesiastical silverware, ecclesiastical vestments and ecclesiastical books from the Collection of Archbishop Spyridon. The Jewish collection exhibits curtains from the building of the old Synagogue, costumes, etc. of the once prosperous Jewish community of Ioannina. The objects of the Muslim collection are displayed in the central space. There are oriental fabrics of the 16th, 17th and 18th centuries, wooden furniture and ivory of the Ali Pasha era, bronze objects and Muslim books.