The Cathedral of St. Michael sits at the southern end of the Castle District. The bishopric was founded by St. Stephen around 1009, making this one of the oldest sees in Hungary. The present cathedral is largely an early-20th-century neo-Romanesque rebuilding on much older foundations — the Gothic crypt below the choir survives from the medieval church.
The interior is high, sober, and quiet, with mosaic decoration in the apse. The free-standing tower next to the cathedral can be climbed for views over the rooftops. The smaller Gizella Chapel next door, with its 13th-century frescoes, is the most evocative medieval survival in the city — worth the small extra ticket.