The first mention of the Roman city of Segobriga was by Greek mapmaker, Strabo in the first century BC.
The cities of Segobriga and Bilbilis both belong to the Celtiberians, and it is near these cities that Metellus and Sertorius had their war [80 BC to 72 BC]. Strabo, Geography, Book III, Chapter 4, Section 13.
Under Augustus, the city became a municipium, populated and governed by Roman citizens. The construction of the theater began under the emperor Tiberius and was completed during the Flavian period, circa AD 79.
The lower portion of the theater was for the orchestra, the first level of tier seating was reserved for the authorities. The stage was wooden and behind the stage stood monumental scenery with two levels of columns and marble sculptures representing the nine muses and the Roman imperial family. The goddess Roma stood at the center.
Segóbriga Archaeological Park
The park and museum give the visitor an overview of the city of Segobriga and daily life. Included in the museum are many sculptures, including the head of Vipsania Agrippina, wife to Tiberius.
Vipsania Agrippina (36 BC – 20 AD) was the daughter of Roman general, statesman, and architect, Marcus Vipsanius Agrippa. Agrippa was a close friend of Augustus, and largely responsible for his victory at Actium against Mark Antony and Cleopatra. In 19 BC, Vipsania married Tiberius and they had a son. When she was pregnant with a second child, the emporer Augustus forced Tiberius to divorce Vipsania and marry his daughter Julia the Elder, third wife of Agrippa, who had by then died.
Tiberius pined away for Vipsania. Their son was responsible for commissioning many sculptures of his mother.
Theater reconstruction from the Segóbriga Archaeological Park Museum with the forum at the top right of the image.