The Church of the Great Seminary was built in the early 18C for the Teutonic Order by Johann Michael Prunner, according to the plans of the famous architect Johann Lukas von Hildebrandt. The exterior is highly ornate and to have succeeded in investing such a small building with great majesty is a masterly tour de force. The vaulting is adorned with graceful stuccowork by Paolo d'Allio, while the high altar offers a moving Crucifixion painted by Martino Altomonte.