Valletta (; ) is the capital city of Malta, colloquially known as Il-Belt (; ) in Maltese. Geographically, it is located in the central-eastern portion of the island of Malta having its eastern coast with access to the Marsamxett Harbour and its western coast in the Grand Harbour. The historical city has a population of 6,675. Valletta is the second southernmost capital of the EU member states after Nicosia, Cyprus. Valletta contains buildings from the 16th century onwards, built during the rule of the Order of St. John of Jerusalem, also known as Knights Hospitaller. The city is essentially Baroque in character, with elements of Mannerist, Neo-Classical and Modern architecture in selected areas, though World War II left major scars on the city; particularly the demolition of The Royal Opera House. The City of Valletta was officially recognised as a World Heritage Site by UNESCO in 1980. The official name given by the Order of Saint John was Humilissima Civitas Valletta—The Most Humble City of Valletta, or Città Umilissima in Italian. The bastions, curtains and ravelins along with the beauty of its Baroque palaces, gardens and churches, led the ruling houses of Europe to give the city its nickname Superbissima—Most Proud.