Waqfs in the Crimean Khanate

Waqf is a traditional type of Muslim charity. It became widespread in the Crimean Khanate. Waqfs constituted a large property fund in Crimea. What types of waqfs existed during the reign of the Gerais? How were they managed?
Based on materials from Denis Konkin “Crimean vakufs in the second half of the 19th century: historical and legal aspect.”