Siege of Rome: King Vitiges attempts to assault the northern and eastern city walls, but is repulsed at the Praenestine Gate, known as the Vivarium, by the defenders under the Byzantine generals Bessas and Peranius.

The first siege of Rome during the Gothic War lasted for a year and nine days, from 2 March 537 to 12 March 538. The city was besieged by the Ostrogothic army under their king Vitiges; the defending East Romans were commanded by Belisarius, one of the most famous and successful Roman generals. The siege was the first major encounter between the forces of the two opponents, and played a decisive role in the subsequent development of the war.

Vitiges was king of Ostrogothic Italy from 536 to 540. He succeeded to the throne of Italy in the early stages of the Gothic War of 535–554, as Belisarius had quickly captured Sicily the previous year and was in southern Italy at the head of the forces of Justinian I, the Eastern Roman Emperor.

The Aurelian Walls are a line of city walls built between 271 AD and 275 AD in Rome, Italy, during the reign of the Roman Emperor Aurelian. They superseded the earlier Servian Wall built during the 4th century BC.

The Porta Maggiore, or Porta Prenestina, is one of the eastern gates in the ancient but well-preserved 3rd-century Aurelian Walls of Rome. Through the gate ran two ancient roads: the Via Praenestina and the Via Labicana. The Via Prenestina was the eastern road to the ancient town of Praeneste. The Via Labicana heads southeast from the city.

A vivarium was an enclosure where the ancient Romans kept wild animals used for hunts or other types of entertainments, for example in amphitheatres.