Hospital de Santa Marta (Portuguese pronunciation: [ɔʃ.piˈtaɫ dɨ ˈsɐ̃.tɐ ˈmaɾtɐ], "Saint Martha's Hospital") is a public Central Hospital serving the Greater Lisbon area as part of the Central Lisbon University Hospital Centre (CHULC), a state-owned enterprise. Originally a Poor Clares nunnery, it became one of the country's main schools of Internal Medicine during most of the 20th century; more recently, it became especially differentiated in Cardiology and Cardiothoracic Surgery: it is one of the main reference centres on the diagnosis and treatment of cardiovascular disease in Portugal.