Constantinople was founded by Roman Emperor Constantine I in 324 CE. The city served as the capital for the Roman Empire and later the Byzantine Empire. It has faced many sieges and attacks throughout the years but managed to remain standing.
Tacitus was a member of this Roman elite, and whether there is a bias in his writing is difficult to know. Indeed, Tacitus was still a boy at the time of the fire. He would have been a young teenager in 68 A.D., when Nero died.