RaqqaRaqqa (ar-Raqqah, also ) is a city in Syria on the left bank of the Euphrates River, about east of Aleppo. It is located east of the Tabqa Dam, Syria's largest dam. The Hellenistic, Roman, and Byzantine city and bishopric Callinicum (formerly a Latin and now a Maronite Catholic titular see) was the capital of the Abbasid Caliphate between 796 and 809, under the reign of Harun al-Rashid. It was also the capital of the Islamic State from 2014 to 2017. With a population of 531,952 based on the 2021 official census, Raqqa is the sixth largest city in Syria.
DiocletianDiocletian (ˌdaɪ.əˈkliːʃən, ; Gaius Aurelius Valerius Diocletianus, Diokletianós; 242/245 – 311/312), nicknamed "Jovius", was Roman emperor from 284 until his abdication in 305. He was born Diocles to a family of low status in the Roman province of Dalmatia. Diocles rose through the ranks of the military early in his career, eventually becoming a cavalry commander for the army of Emperor Carus. After the deaths of Carus and his son Numerian on a campaign in Persia, Diocles was proclaimed emperor by the troops, taking the name Diocletianus.
Middle PersianMiddle Persian or Pahlavi, also known by its endonym Pārsīk or Pārsīg (𐭯𐭠𐭫𐭮𐭩𐭪) in its later form, is a Western Middle Iranian language which became the literary language of the Sasanian Empire. For some time after the Sasanian collapse, Middle Persian continued to function as a prestige language. It descended from Old Persian, the language of the Achaemenid Empire and is the linguistic ancestor of Modern Persian, an official language of Iran, Afghanistan (Dari) and Tajikistan (Tajik).