The Escola Superior Náutica Infante D. Henrique (formerly "Escola Náutica Infante D. Henrique") or ENIDH is a state-run college of higher education dedicated to nautical studies, situated in Paço de Arcos, Oeiras, in the Portuguese district of Lisbon. Literally, the Prince Henry Nautical School, it was named for the Portuguese prince Henry the Navigator. It is the official Portuguese maritime college and specializes in maritime studies.