Starting in 1643, about 150 delegations ​ — some with large teams of advisers — ​ descended on the two towns, Catholic envoys gathering in Münster, Protestant delegates in Osnabrück.
Sejak tahun 1643, sekitar 150 delegasi ​ — beberapa dengan tim - tim besar penasihat ​ — tiba di kedua kota ini, para utusan Katolik berkumpul di Münster, para delegasi Protestan di Osnabrück.