(Sheikh Safi al-din Khānegāh and Shrine Ensemble in Ardabil)
Built between the beginning of the 16<sup><span style="font-size: xx-small;">th</span> </sup> century and the end of the 18<sup><span style="font-size: xx-small;">th</span> </sup> century, this place of spiritual retreat in the Sufi tradition uses Iranian traditional architectural forms to maximize use of available space to accommodate a variety of functions (including a library, a mosque, a school, mausolea, a cistern, a hospital, kitchens, a bakery, and some offices). It incorporates a route to reach the shrine of the Sheikh divided into seven segments, which mirror the seven stages of Sufi mysticism, separated by eight gates, which represent the eight attitudes of Sufism. The ensemble includes well-preserved and richly ornamented facades and interiors, with a remarkable collection of antique artefacts. It constitutes a rare ensemble of elements of medieval Islamic architecture.