Marburg Castle (Landgrafenschloss)

Marburg Castle, the Landgrafenschloss, occupies the hilltop above the old town and served as the primary residence of the Landgraves of Hesse from the 13th century until the line's Kassel and Marburg branches split the territory in the 16th and 17th centuries. The surviving great hall (Wilhelmsbau) and chapel date largely from the 13th and 14th centuries, built under Landgrave Henry I, while later wings were added and altered as the castle's role shifted from residence to administrative seat and eventually to storage and barracks use after the Landgraves relocated their main court. The castle's best-known historical episode is the Marburg Colloquy of October 1529, convened by Landgrave Philip I of Hesse to unite the Protestant reform movements against the Catholic Emperor; Martin Luther and Huldrych Zwingli met in the great hall to debate the nature of the Eucharist but could not agree on whether Christ was physically present in the bread and wine, a disagreement that formalized the lasting split between Lutheran and Reformed (Zwinglian) Protestantism. The hall where the debate took place survives and is used today for the university's historical museum and cultural events. Architecturally the castle combines high medieval defensive stonework, visible in the surviving keep and curtain walls, with later Gothic hall construction featuring ribbed vaulting. Restoration in the 20th century stabilized the structure after long periods of secular use and neglect, and the University of Marburg, which owns the site, now operates it as the Museum für Kulturgeschichte, presenting the castle's furnishings and regional history in rooms arranged largely by period, from the medieval Landgraves through the 19th century.