Among the more notable of the “sights” which the city has to offer, first mention should perhaps be made of the massive-looking cathedral with its triple domes. Originally founded as early as the fifth century, it has been several times rebuilt--twice after destruction by fire. The central dome, choir and transept date from the fifteenth, but the main portion from the seventeenth century. To the west of the cathedral is the old Canon’s Residence, on the site of an earlier building in which the Treaty of Passau was signed on 2 August, 1552; by that treaty the Lutherans were to be permitted the free exercise of their religion, so that the city of Passau occupies an important place in the history of liberal opinion and freedom of conscience. Yet it has also its memories of the terrors of intolerance; for in the one-time palace of the bishops of Passau was a special dungeon in which in the Middle Ages all Jews found in the town were incarcerated and left to die of starvation, while other dungeons were later given over to the merciless stamping out of the “Anabaptists.” [Illustration: OBERHAUS AND NIEDERHAUS, PASSAU] To the east of the cathedral is the handsome Bishop’s Palace with the ornate Wittelsbach Fountain in front. On the Danube side--near to where the steamers of the Donau Dampfschiffahrts Gesellschaft start--stands the old Rathaus, with a handsome modern clock-tower, within which the sight-seer may visit the town museum and see a series of paintings by Herr F. Wagner depicting scenes in the history of Passau. On the further side of the town is a grand old cone-roofed tower--known as the Inn Tower or Powder Tower--forming a picturesque feature in the river view.