Teutonic Knights

The Teutonic Knights or Teutonic Order (Latin: Ordo domus Sanctæ Mariæ Theutonicorum Ierosolimitanorum, "Order of the German House of St. Mary in Jerusalem", German: Orden der Brüder vom Deutschen Haus St. Mariens in Jerusalem or more commonly Deutscher Orden) is a German-based Roman Catholic religious order formed at the end of the 12th century in Acre, Palestine. During the Middle Ages they were a crusading military order and wore white surcoats with a black cross. It is now a clerical order based in Vienna, Austria.
See more at Wikipedia.org...

A military-religious order of knights that restricted membership to Germans. They were part of the original Hospitallers , but under Hermann von Salza they split from the main branch and founded their own order, taking on a very distinctive white cloak bearing a stark black cross on the left shoulder. Upon the fall of Acre in 1291 they retired to Venice where Emperor Frederick II commissioned them to convert the heathens in Prussia, Lithuania, and Estonia, becoming a very successful order headquartered in Marienburg from 1309-1509.