Festung Königshofen, Castle complex in Bad Königshofen im Grabfeld, Germany

Festung Königshofen stands at Kellereistraße 61 in the northeast corner of Bad Königshofen's old town. The two-storey, three-winged building has a main wing of ashlar stone with a pitched roof and stepped gables, while the lower courtyard wings are rubble stone. It was built in 1856 as the Rentamt on the palace site, incorporating remains of the earlier palace; only a rampart remnant survives from the castle.

First mentioned in 1245 under the Counts of Henneberg, the site underwent major transformation into a palace between 1518 and 1520 by Prince-Bishops. This shift marked the transition from defensive stronghold to a residence reflecting ecclesiastical power.

The name Festung Königshofen is retained although the site has long been a palace and administrative building rather than a fortress. Franz Anton von Dalberg, commander of the fortress from the early 18th century, had previously been a canon in Speyer from 1680 to 1711 before becoming a major general.

The location sits in the town center at Kellereistrasse 61, accessible from the old town area. Since the building is currently in private use, external viewing of the architecture from street level remains possible.

Franz Anton von Dalberg (1669–1725), a former canon of Speyer who resigned his post in 1711, became a major general and commander of Königshofen Fortress; he is buried in Königshofen. Of the medieval castle itself, only a remnant of the rampart survives today.