nima F.
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The Porta Maggiore was built during the construction of one of Rome's aqueducts in the first century AD. In the third century the gate became part of the city walls. Right beside the gate is the famous Baker's Tomb.
First known as Porta Praenestina, the gate now known as Porta Maggiore was built in 52 AD by order of the emperor Claudius. It was created as a double archway and supported two aqueducts that converged here - the Aqua Claudia and the Anio Novus. The youngest of the two aqueducts, the Aqua Claudia, was built on top of the pre-existing Anio Novus.
Two ancient roads ran through the archways: the Via Praenestina, which was the eastern road that led to the town of Palestrina (formerly Praeneste); and the Via Labicana, which traveled southeast from the city.