The National Library of Malta (), often known as the Bibliotheca (), is a reference library in Republic Square, Valletta, Malta. It was founded by Grand Master Emmanuel de Rohan-Polduc in 1776 out of the collections of the knight Louis Guérin de Tencin. It has been a legal deposit library since 1925, and it has the largest collection of Melitensia along with that of the University of Malta. The library also contains the archives of the Order of St. John, the Università of Mdina and the Università of Valletta. The library is housed in a late 18th-century neoclassical building in the city centre, close to the Grandmaster's Palace, designed by Polish-Italian architects Stefano Ittar and his son Sebastiano Ittar. History The origins of the National Library of Malta go back to 1555, when Grand Master Claude de la Sengle decreed that all books belonging to deceased members of the Order of St. John were to be passed to the Order's treasury. In 1760, Louis Guérin de Tencin, the Bailiff Grand Cross of the Order, purchased a collection of 9700 books which had belonged to Joaquín Fernández de Portocarrero for 7000 scudi. A year later, he opened a public library in a building known as Il Forfantone in Valletta, containing books from his own library as well as Portocarrero's collection, the library of Comm. Sainte-Jay (which was previously kept at the sacristy of the Conventual Church of St. John), and books donated by members of the Order. De Tencin appointed Giovanni Pietro Francesco Agius de Soldanis as librarian, and paid his salary himself. De Tencin died in 1766 before managing to secure funds for maintaining the library. In 1776, Grand Master Emmanuel de Rohan-Polduc formally founded the Bibliotheca Publica, and it was also called the Bibliotheca Tanseana in De Tencin's honour. The Forfantone was considered too cramped to house the new library, so the Polish-born Italian architect Stefano Ittar was commissioned to design a new library building in 1786. The building was built on the site of the Conservatoria, where gold and silver bullion of the Order's treasury were stored. It was completed in 1796, but it remained empty for some years due to the French invasion of 1798. It was eventually inaugurated on 4 June 1812 by Civil Commissioner Sir Hildebrand Oakes, and it became known as the Malta Public Library. It became a legal deposit library by Act no.