This is inside the walled city. Büdingen Castle, a moated castle built by Lord Gerlach II von Büdingen in the thirteen century. Inside the thirteen angular wall ring are the main castle, the residence of the Lord, and the Gothic chapel. http://www.bedinger.org/the-ancient-city-of-buumldingen.html https://i1.wp.com/www.landpartie-schloss-buedingen.de/wp-content/uploads/2017/01/buedingen-main.jpg