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The ruins of Absalon's castle and Copenhagen photo:  Thorkild Jensen

Christiansborg Palace is built on the ruins of an 800-year-old castle

The ruins under Christiansborg Palace

The largest and oldest ruin under the palace is the curtain wall from Bishop Absalon’s 12th century castle. The curtain wall protected the castle from Wendish pirates that attacked Copenhagen from the south. Absalon put their severed heads on stakes outside the castle walls to inspire fear and serve as a warning to the pirates.

The King's daughter was incarcerated for 22 years

The foundations of the fabled Blue Tower, the largest tower at Copenhagen Castle, form the other great ruin under the castle. Political prisoners and other criminals were incarcerated in the Blue Tower. The most famous prisoner was Christian IV’s favourite daughter, Leonora Christina. She was locked up in the tower for 21 years, 9 months and 11 days, paying for the crimes of her husband, Corfitz Ulfeldt, who was convicted of treason.

Guided Tour of the Ruins under Christiansborg

In English: Saturdays at 12:00