The best-preserved of Fez's historic synagogues, the Ibn Danan was built in the seventeenth century and restored in the 1990s by a joint Moroccan-American project. It is a beautiful, intimate space with a central bimah (reading platform), wooden galleries, and a functioning mikveh (ritual bath) below floor level — one of the only surviving mikvehs in Morocco.
The synagogue is now part of the circuit managed by the city's Foundation for the Protection of Historic Sites. A caretaker can usually be found to let you in and explain the building. The Jewish community of Fez is now almost entirely gone — most emigrated to Israel and France in the 1950s and 60s — but the synagogue is kept in good order as part of Morocco's effort to acknowledge its Jewish heritage.