The Bricciuskirche church in Bad Belzig is inextricably linked to the history of Eisenhardt Castle. Traces of a possible earlier church lie hidden within the castle walls, hinting at a long religious presence on the site. Standing proudly apart from the castle, the Bricciuskirche was built by the Dukes of Saxony-Wittenberg as a powerful symbol of their authority, a trend seen only among the elite of the nobility at that time. Later rulers from the House of Wettin dynasty embraced the Bricciuskirche into their grand building projects, and the resulting modifications continue to define the church's appearance today.