Originally built in the 11th century by Bishop St. Maurice, this four-towered cathedral has been destroyed and rebuilt more than once like many buildings during wars. The Turkish used it as a mosque and embellished it with a minaret (spire). At the end of the 19th century, the present neo-Romanesque exterior was added. The interior remains primarily Gothic, with some baroque additions and furnishings. The frescoes by leading 19th-century artists, Károly Lotz and Bertalan Székely, are inside. Organ concerts are performed in the cathedral throughout the year; inquire at the cathedral (no English spoken) or at Tourinform for the schedule.

The square in front of the cathedral and the beautifully landscaped park with a magnificent fountain beneath it is a popular gathering place, and occasionally the site of folk concerts, dances, and fairs. No photos or videos are allowed.