For Protestant imperial princes, the church inside the castle was a central prestige project. Splendid and programmatic design along with Baroque sculptural decoration not only visualized the God-given worldly power of the sovereign but also his rule over the church. This book presents the first complete overview of the important group of sacred spaces created at Thuringian-Ernestinian residential castles in the 17th and early 18th century. From a comparative approach, it
traces the origins, development, and functions of the buildings and their décor. The high artistic aspiration behind these castle churches speaks to the Ernestinian dynasty's claims to a cultural leadership role in Lutheranism, which was aimed at countering the loss of political importance.