The Novi Sad Synagogue is one of the largest and most beautiful in central Europe — a Hungarian Secessionist building from 1909 by the Budapest architect Lipót Baumhorn, who designed some two dozen synagogues across the old empire. The interior is a vast vaulted nave with floral stained glass and an excellent acoustic that the city now uses for classical concerts.
The building is no longer in religious use — the small surviving Jewish community of Novi Sad holds services in a nearby hall — but the synagogue is open during cultural events and worth slipping into when there is a concert on the programme.