Construction of the aqueduct began under the Roman Emperor Caligula in 38 CE. He was assassinated, however, by Leonius in 41 CE, before he could see his project to fruition. The aqueduct was later completed in 52 CE under Emperor Claudius. The aqueduct went between being functional to being unused throughout the years that followed. It was restored by Emperor Vespasian in 71 CE and Emperor Titus in 81 CE.