BAP Almirante Grau (CLM-81) is a De Zeven Provinciën-class cruiser in service with the Peruvian Navy. Completed for the Royal Netherlands Navy in 1953 as HNLMS De Ruyter (C801), it was acquired by Peru in 1973. Since then, it has served as the fleet flagship of the Peruvian Navy. The Almirante Grau underwent a major modernization program between 1985 and 1988 during which it was fitted with new weapons and electronics. It is currently the last gun cruiser in service in any navy.