More details on the proposed location of the covenant.
About 30 km northeast of Bamberg, on the south shore of the Main river, is the small town of Staffelstein. In the heights above the town is the Banz Abbey, just north of the river. In Staffelstein, as in several place along the upper Main, hot springs bubble up to the surface.
Just north of the town is a hill named Staffelberg, which was the site of an Oppidum (a fortified town) during the time of the Celts. There are a few shallow caves on the sides of Staffelberg, one of which is the entrance to a magical regio under the hill.
The regio was discovered almost 2 centuries ago and used to establish a small Hermetic covenant. The magi who lived there expanded the caves under the hill to install their labs and living quarters, but were forced to abandon it after when the local vis sources began to dry out, but also because the entrance to the regio appeared to become unstable.
A few years ago, Tandaline of Bonisagus found out about the site and investigated it. She found that at least one of the former vis sources had regenerated, though it was a bit inconvenient to harvest as it is a bit irregular. Still, she thought the location could be suitable to establish a new covenant, and passed along the information.