The Teutonic Order was a Holy Order of Catholicism so powerful and so strong, it could use the sword to influence the baltic people to convert to catholicism. It had such knowledge in the art of war , it could keep the baltics from reconverting. It became so strong, the only thing it was afraid of was to run out of heatens to convert, which eventually, of course, it did. Unfortunately it got a Großmeister that converted it to a protestant dutchy. It's Ironic, it could keep others Catholic, but not itself.