Khanqahs is a term used for structures such as dervish lodges, tekkes, and zaviyes. They are known as spaces used by Sufis for education, purification of the self, and spiritual development. These structures, which are an important part of Islamic civilization, have been centers where people of the heart have performed their worship and spiritual practices for centuries. Muhsin Keyani's work, History of Khanqahs, examines these institutions in the Islamic world and their functions in detail.