At Oppenheim a small market town a few miles north of Worms, Martin Bucer who had left the Dominicans (with permission) and was now chaplain to von Sickingen, arrived with a plan that Luther should turn off into the hills and go up to the Ehrenberg castle, where the knights von Sickingen and Hutten would protect him and give him a power base from which to negotiate. (religion-online.org)