The “Konzil” in Constance is a nice restaurant today. Located next to the lake of Constance and really close to the Imperia, which is also a sight of Constance.
The council has a historical background as well. The council in Constance (5. November 1414 until 22. April 1418) was an assembly of the head of the church, which was convened from pope Johannes XXIII. That was the only time when a council was outside of Italy.Website