As early as 739, the predecessor building of St. Stephen’s Cathedral in Passau became the cathedral of the diocese of Passau. The magnificent Baroque building in its present form was built after the devastating city fire of 1662 under the direction of the Italian architects Carlo Lurago and Giovanni Battista Carlone. With its white towers and blue-green domes, the church is today considered the most authoritative baroque church north of the Alps. The interior of St. Stephen’s Cathedral is particularly magnificent, with lots of stucco in the Baroque style. It is also home to the largest church organ in the world, which dates from 1928. No wonder, then, that the organ concerts in Passau Cathedral are so popular.