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.
Alates aastast 1643 saabus neisse kahte linna ligi 150 saadikut, kellest mõnel oli kaasas veel hulk nõunikke.