New Rome (Greek: ?, Nea Rom?; Latin: Nova Roma) was a name sometimes used to describe the new city that the Roman Emperor Constantine created as his new imperial capital on the European coast of the Bosphorus strait. The city was known as Byzantium prior to his rededication, and as Constantinople thereafter, until the 20th century, when it was renamed Istanbul. 'New Rome' was never an official title, but was sometimes used as a laudatory description of the city, which was often compared with Rome in many ways.
Constantine essentially rebuilt the city on a monumental scale from 326 to 330, partly modeling it after Rome. Names of this period included ? , ? ?, "the New, second Rome";? ?, "Alma Roma"; ?, "Byzantine Rome"; ?, "Eastern Rome"; and Roma Constantinopolitana.:354
The term "New Rome" was used to indicate that Byzantium, thereafter Constantinople, was the second/new capital of the Roman Empire, since 285 CE when Diocletian established it as the center for the eastern provinces. In modern times, "New Rome" remains part of the official title of the Orthodox Ecumenical Patriarch of that city.