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Rome - Janiculum

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The Janiculum (Gianicolo in Italian) is a hill in western Rome, Italy. Although the second-tallest hill (the tallest being Monte Mario) in the contemporary city of Rome, the Janiculum does not figure among the proverbial Seven Hills of Rome, being west of the Tiber and outside the boundaries of the ancient city.
The Janiculum is one of the best locations in Rome for a breathtaking view of the innumerable domes and bell towers that pierce the skyline of the multi-hued architectural museum. Other sights on the Janiculum include the church of San Pietro in Montorio, built upon the site formerly thought to be where St Peter was crucified; the small shrine known as the Tempietto, designed by Donato Bramante, marks the supposed site of Peter's death. The Janiculum also houses a Baroque fountain built by Pope Paul V in the late-17th century, the Acqua Paola, and several foreign research institutions, including the American Academy in Rome and the Spanish Academy in Rome. The Hill is also the location of the American University of Rome, Pontifical Urban University, and Pontifical North American College, as well as the Orto Botanico dell'Università di Roma "La Sapienza" and the Palazzo Montorio, residence of the Ambassadors of Spain.
The Aurelian Walls were carried up the hill to include the water mills used to grind grain towards providing bread flour for the city. The mill was, thus, it is presumed, built at the same time as or before the walls were built by the emperor Aurelian (reigned 270-275 AD). The mills were supplied from an aqueduct, where it plunged down a steep hill. Thus, the site resembles Barbegal, although excavations in the late 1990s suggest that they may have been undershot rather than overshot in design. The mills were in use in 537 AD when the Goths besieging the city cut off their water supply. However, they were subsequently restored and may have remained in operation until at least the time of Pope Gregory IV (827-44).[3]
The Janiculum is the site of a battle in 1849 between the forces of Garibaldi, defending the revolutionary Roman Republic against French forces, who were fighting to restore the Temporal power of the Pope over Rome. Because of this battle, several monuments to Garibaldi and to the fallen in the wars of Italian independence are on the Janiculum, as well.
Daily at noon, a cannon fires once from the Janiculum in the direction of the Tiber to signal the exact time. This tradition goes back to December 1847, when the cannon of the Castel Sant'Angelo gave the sign to the surrounding belltowers to start ringing at midday. In 1904, the ritual was transferred to the Janiculum and continued until 1939. On 21 April 1959, popular appeal convinced the Commune of Rome to resume the tradition after a twenty-year interruption.