He designed several Baroque buildings, including Auberge de Castille in Valletta, which is now the Office of the Prime Minister of Malta.
He was born in Valletta on 13 October 1703 to the surgeon Giuseppe Belli and his wife Francesca Romano.
[1] As an entrepreneur, Belli became a successful businessman by having achieved monopoly from Grand Master Pinto over the export of Maltese limestone and other products to Africa, Asia and Europe.
[3] Under the influence of his brother Gabriele, listener of the Master Mason Pinto,[4][5] Andrea got regular commissioned works by the Order of Malta as designer of the main buildings of the 18th century Maltese Baroque architecture.
Notable buildings made or attributed to him include:[1][6] Auberge de Castille is regarded as his masterpiece.