Jovian was Roman emperor from June 363 to February 364. As part of the imperial bodyguard, he accompanied Julian on his campaign against the Sasanian Empire. Julian was killed in battle, and the exhausted and ill-provisioned army declared Jovian his successor. Unable to cross the Tigris, Jovian made peace with the Sasanids on humiliating terms. He spent the rest of his seventh-month reign traveling back to Constantinople. After his arrival at Edessa, Jovian was petitioned by bishops over doctrinal issues concerning Christianity. Albeit the last emperor to rule the whole Empire during his entire reign, he died at Dadastana, never having reached the capital.

Singidunum was an ancient city which later evolved into modern Belgrade, the capital of Serbia. The name is of Celtic origin, going back to the time when the Celtic tribe Scordisci settled the area in the 3rd century BC, following the Gallic invasion of the Balkans. Later on, the Roman Republic conquered the area in 75 BC and incorporated it into the province of Moesia. It was an important fort of the Danubian Limes and Roman Legio IV Flavia Felix was garrisoned there since 86 AD. Singidunum was the birthplace of the Roman Emperor Jovian. It was sacked by Huns in 441, and by Avars and Slavs in 584. At the beginning of the 7th century, the Singidunum fort was finally destroyed.