Absalon's Castle

Absalon's Castle was a historic fortification situated on the island of Slotsholmen in Copenhagen, Denmark. Founded in 1167 by Bishop Absalon of Roskilde, the structure was established to protect the emerging city following a gift of the land from King Valdemar I. The castle featured a robust curtain wall constructed from limestone sourced from the Stevns Cliffs, encircling an inner courtyard that housed the bishop's residence, a chapel, and various minor buildings. Architecturally, it served as a classic medieval episcopal palace designed for both religious administration and military defense during a volatile period in Danish history.

The site holds profound historical significance as the precursor to the later Copenhagen Castle and the current Christiansborg Palace. After Bishop Absalon's death in 1201, ownership transferred to the Diocese of Roskilde, sparking nearly two centuries of contentious feuds between the crown and the church regarding possession. This conflict culminated in 1368 when a coalition including the Hanseatic League conquered the city. As stipulated by the subsequent peace treaty, the castle was completely demolished in 1369 to prevent its future military use, marking the end of its two-century existence.

Today, the castle exists only as ruins located in subterranean excavations beneath Christiansborg Palace. These remnants were rediscovered and carefully excavated in 1907 and 1917 during construction work on the modern palace. Visitors can currently view the preserved limestone curtain wall, foundations of internal houses, and a unique well crafted from hollowed-out oak trunks. The site stands as a tangible link to Copenhagen's origins, illustrating the city's evolution from a protected bishopric stronghold to the capital of Denmark.