The only Ottoman-era mosque still functioning in Sofia, built in 1576 over a thermal spring (the name means "many baths"). A square brick prayer hall under a single dome, with a tall minaret beside it. The Friday prayer fills the building.
It sits at the heart of a remarkable urban tableau: an Orthodox cathedral, a synagogue, a Catholic cathedral, and the mosque all stand within 300 metres of each other. Visitors are welcome outside prayer times; remove your shoes and dress modestly.