Emperor Gordian III

Shapur I, co-emperor. April 12, 240 AD.

Shapur I, son of Ardashir I reigned over the Sassanian Empire from 241 to 272. Towards the end of his rule, Ardashir had revived the war against the Roman Empire. Shapur continued it, conquering the Mesopotamian fortresses of Carrhae and Nisibis and entering Syria, although his forces were there rejected by the father in law of the young Emperor Gordian III, Timesitheus, and finally defeated in the Battle of Rasaena in 243, forcing him to leave Mesopotamia. Shortly after, Timesitheus died and Gordian was murdered by Philip the Arab, who signed a truce with Persians in 244. Shapur reignited the war shortly after, taking advantage of the Goths´ invasion of the Empire and the continuous succession of emperors that followed the death of Decian (251). Shapur conquered Armenia, invaded Syria and...

The Bostran Era. March 22, 106 AD.

The Bostran Era (also called Arabian Era) started corresponding to March 22, 106 AD. This was the official dating of the Roman Province Arabia Petraea, and it was introduced in order to make it coincide with the regnal years after the inclusion of the Nabatean Kingdom to the Roman Empire. It has the name of the city of Bostra, that soon was the home of the Sixth Legion. The start date of the Bostran Era was a controversial matter, in part because the Chronicon Paschale states that it started at the time of the consuls Candidus and Quadratus (105), while the discoveries of the Cave of Letters´ manuscripts made it clear that the Bostran Era started on 106. The Bostran year was lunisolar: it has 12 months with 30 days with five epagomenal days at the end of each year. The names of the months ...

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