Halil Bey mosque, Ottoman mosque in central Kavala, Greece

Halil Bey Mosque stands in the centre of the small peninsula of Kavala's port, near the old fortress. It was probably built in the 1530s, around the same time as the larger Ibrahim Pasha Mosque. The building is bright red in colour, and its glass floor reveals the remains of a Byzantine church dedicated to Saint Paraskevi. A madrasa with eight student rooms adjoins it.

Halil Bey Mosque was probably built in the 1530s, around the time of the larger Ibrahim Pasha Mosque, on the site of a Byzantine church dedicated to Saint Paraskevi. The church was most likely converted into a mosque first, with the present building raised on the same spot. A Halil Bey quarter appears in a tax register of 1569. After the Balkan Wars the building passed to Greece; it served as a girls' school, then housed Greek refugees after the 1923 population exchange, and its minaret was demolished in the 1950s.

The mosque served as home to the municipal philharmonic orchestra from 1930 to 1940, earning its local nickname the 'Mosque of Music'. This unexpected use continues to shape how residents think about the building today.

The building sits near the Castle and now functions as a museum and event venue with rotating exhibitions displayed inside and in the forecourt. Multiple spaces are available for visitors to explore at their own pace.

The madrasa beside the mosque, with eight student rooms, now houses an informal folklore museum run by the local beautification association, not a religious school. The minaret was demolished in the 1950s and never rebuilt, so the prayer hall stands without one.