 Between the 13th and 16th centuries CE, Sufism produced a flourishing intellectual culture throughout the Islamic world, a "Golden Age" whose physical artifacts are still present.In many places, a lodge (known variously as a "zaouia", "khanqah", or "tekke") would be endowed through a pious foundation in perpetuity ("waqf") to provide a gathering place for Sufi adepts, as well as lodging for itinerant seekers of knowledge.The same system of endowments could also be used to pay for a complex of buildings, such as that surrounding the Süleymaniye Mosque in Istanbul, including a lodge for Sufi seekers, a hospice with kitchens where these seekers could serve the poor and/or complete a period of initiation, a library, and other structures.