Trastevere () is the 13th of Rome: it is identified by the initials R. XIII and it is located within Municipio I. Its name comes from Latin , literally 'beyond the Tiber'. Its coat of arms depicts a golden head of a lion on a red background, the meaning of which is uncertain. History In Rome's Regal period (753–509 BC), the area across the Tiber belonged to the Etruscans: the Romans named it Ripa Etrusca (Etruscan bank). Rome conquered it to gain control of and access to the river from both banks, but was not interested in building on that side of the river. In fact, the only connection between Trastevere and the rest of the city was a small wooden bridge called the Pons Sublicius (English: 'bridge on wooden piles'). By the time of the Republic c. 509 BC, the number of sailors and fishermen making a living from the river had increased, and many had taken up residence in Trastevere. Immigrants from the East also settled there, mainly Jews and Syrians. The area began to be considered part of the city under Augustus, who divided Rome into 14 regions (regiones in Latin); modern Trastevere was the XIV and was called Trans Tiberim. Since the end of the Roman Republic the quarter was also the center of an important Jewish community, which lived there until the end of the Middle Ages. Rome's oldest remaining synagogue, though not used as such any longer, is found in the district. The building was constructed in 980, and became a synagogue in 1073 through the efforts of lexicographer Nathan ben Yechiel. Within the building there was also a mikveh. At the base of the central column Hebrew writing is still visible. Its use as a synagogue ended when the Jews were forced to move to the Roman ghetto on the other side of the Tiber river in the mid-16th century. It is now used commercially, and can be found at 14, Vicolo dell’Atleta. With the wealth of the Imperial Age, several important figures decided to build their villae in Trastevere, including Clodia, (Catullus' "friend") and Julius Caesar (his garden villa, the Horti Caesaris). The regio included two of the most ancient churches in Rome, the Titulus Callixti, later called the Basilica di Santa Maria in Trastevere, and the Titulus Cecilae, Santa Cecilia in Trastevere. In order to have a stronghold on the right