The Kapuzinerkirche in Vienna is the Capuchins' church (the Church of St. Mary of the Angels) and monastery founded in 1617 and dedicated in 1632. It is on the Neue Markt square, near the imperial Hofburg Palace.
Its subterranean mausoleum is the Imperial Crypt (in German: Kaisergruft but usually called the Kapuzinergruft) that has been the principal place of entombment for the Habsburg dynasty, hereditary Emperors of the Holy Roman Empire, and their descendents.

Text Source: Wikipedia