Fort Saint Elmo (Maltese: Forti Sant'Iermu) is a star fort in Valletta, Malta. It stands on the seaward shore of the Sciberras Peninsula that divides Marsamxett Harbour from Grand Harbour, and commands the entrances to both harbours along with Fort Tigné and Fort Ricasoli. It is best known for its role in the Great Siege of Malta of 1565.