Büraburg Castle

The Büraburg was built around 680 as a Frankish imperial castle to protect the Eder region. It covered an area of about eight hectares, was surrounded by a mortar wall at least 1.50 meters thick, and featured several towers and three gates. Around 700, the fortifications were strengthened with thicker walls. In 723, Saint Boniface used the castle as a base when he felled the Donar Oak. In 742, Boniface elevated Büraburg to a bishopric, with Witta as its first bishop. However, by 755, the bishopric was incorporated into the Archdiocese of Mainz. In 774, the castle protected the population of Fritzlar from Saxon attackers during Charlemagne's Saxon Wars.