The church was remodelled in Baroque style in 1720 (probably) by the architect Anton Erhard Martinelli, while Count Guido von Starhemberg was the commander of the Order.

The walls are decorated with rows of numerous armorial bearings of the Order of Teutonic Knights and several commemorative stones, such as the tombstone of Count Siegfried Sarau with relief work by Giovanni Stanetti and of bailiff Jobst von Wetzhausen (1524) by Loy Hering.

The real start of the Schatzkammer can be dated to 1525 when the Grand Master Albert of Prussia converted to Lutheranism and declared the collections his private property.

Also remarkable are a number of vessels made of coconut shells, such one from Goa with silver mountings and another one in chinoiserie style.

The other rooms contain a collection of oriental arms such as a Sumatran kris with a wavy blade and a rhino horn handle, carved in the shape of Buddha with precious stones.

Another valuable piece of the collection is the charter by Pope Gregory IX from 1235, declaring Elisabeth of Thuringia a saint.