In 1682 Jerusalem Chapel became a Calvinist and Lutheran simultaneum. In 1688 Prince-Elector Frederick III founded another new city under electoral domination, Friedrichstadt, which included "Jerusalem Chapel" in its municipal boundary. In 1689 and 1693–1695 Giovanni Simonetti restored and extended the chapel to become "Jerusalem Church", which was continuously staffed with a Calvinist and a Lutheran preacher from 1694 on. In 1701 the Judge Krause at the Kammergericht (then Supreme Court of Brandenburg) added a sepulchre chapel for his family to the church building.