In what castle of the loire valley was the duke of guise ambushed and massacred on December 23 1588?

The Duke of Guise was ambushed and massacred at the Château de Blois in the Loire Valley on December 23, 1588. This event was part of the power struggles during the French Wars of Religion, where the Duke was a prominent figure. His assassination significantly impacted the political landscape of France at the time.