The enormous complex is covered by the largest continuous ceiling fresco in the world (approx. 580 m²), painted between 1752 and 1753 by Giovanni Battista Tiepolo from Venice, the most famous fresco painter of his time, as well as his sons - especially Giovanni Domenico Tiepolo - and other helpers. Theme: The glorification of the master of the house, the prince-bishop, by the (then recognized) four continents.

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