The construction of the palace started at the beginning of 1574, and bad its definitive shape in 1730.Alot of famous architects bad worked on the project, among them Domenico Fontana and GianLorenzo Bernini.Pietro da Cortona decorated the rooms with frescos, and Ferdinando Fuga decorated the splendid gardens.It was initially the oficial residence of the pl1pes.For the Vatican was an inhospitable place and this one was the highest og the seven bills.There were held the four conclaves of the 19tb century, and the Paolina chapel was used for voting in 1870 it became the residence of the king of Italy, and during the First world War some rooms were used as a military hospital Since 1947 it has been in the residence of the President of the Republic.