This huge building with the plan of a basilisk (1738-1755) was built following the conversion of the Albertins to Roman Catholicism. This conversion allowed them to accede to the Polish throne. Strongly inspired by the Italian Baroque, the church is dominated by an 85 m-high bell tower. Many statues of saints and apostles decorate the building. A painting by Mengs, The Ascension (1750), decorates the master altar. In the crypt are preserved the sarcophagi of several kings and princes of Saxony.