Donato Bramante created the Tempietto in San Pietro in Montorio, Rome, in 1502. Bramante may have constructed the enormous courtyard of the Belvedere as early as 1505, expanding the core of the earlier Vatican palaces to the north and uniting them with the pre-existing villa of Innocent VIII. He also designed the Clementine Library on the upper floor of the Belvedere. Bramante's most important work is considered to be the Tempietto he built for his friend and mentor Julius II. The little chapel was originally surrounded by a garden but this has now been transformed into an open public space called Bramante Piazza. Donato's son Vincenzo continued his father's work at the Belvedere and completed many projects including the restoration of parts of the Vatican palace damaged during the Sack of Rome in 1527. His grandson Giuseppe would go on to become one of Italy's most famous architects, best known for designing the Santa Maria del Popolo church in Rome. Donato died in 1514 aged 44 years old. He had been appointed chief architect of the Roman Church just three years before his death. His works can be seen all over Rome and they still influence modern architecture today. The Tempietto and the Belvedere are two examples of his work that can be visited today.