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Byzantiumfor other, similarly-named pages.
Byzantium remained the name of the city around the time of Jesus Christ. The First Doctor, Barbara, Vicki and Ian visited the city in 64 AD, and found it to be a city struggling with three groups vying for power: the Jewish Pharisees, the Roman Empire and the adherents of the fledgling Christian religion. (PROSE: Byzantium)
Byzantium begat New Byzantium. The Seventh Doctor once told Ace that he thought New Byzantium stole the name because the two cities had a similar geography, both cities being set "on an isthmus of land, cut through by a strait linking two seas". (PROSE: Shadowmind)
The name switched to Constantinople in the early part of the first millennium. Benny once told Ace that the name switch was in honour of Emperor Constantine. She went on to say that Constantinople was "the capital of the Eastern Roman Empire until the 15th century, when it was captured by the Turks". (PROSE: Shadowmind)
In the 3rd century, an incarnation of the Doctor encountered Fenric in Constantinople, where he defeated him at chess and trapped him in a flask. (TV: The Curse of Fenric) By his fourth incarnation, the Doctor bought a hookah in Constantinople, which he would later use as part of a ruse to evade the Chancellery Guard on Gallifrey. (TV: The Deadly Assassin)
In 540, the First Doctor, Vicki and Steven Taylor visited Constantinople. However, through the machinations of the Monk to sabotage the Doctor's timeline, the First Doctor's place was taken by the Fifth Doctor. This damage would later be repaired. (AUDIO: The Secret History)
By 1963, Constantinople had become Istanbul. Susan Foreman, while taking school on Earth, once forgot the time and called the city Constantinople. In consequence, her geography teacher made his entire 4G class chant, "It's Istanbul, not Constantinople!" (PROSE: Time and Relative)
In the 21st century, the Ninth Doctor fought Sontarans on a rooftop in Istanbul. Sally Sparrow saved his life from one of them, and gave him her Christmas homework for instructions for when the TARDIS would "burp" and jump forward in time twenty years without the Doctor. (PROSE: What I Did on My Christmas Holidays by Sally Sparrow)
Behind the scenes Edit
Narratives in the Doctor Who universe have not, as of 2011, particularly defined when the city's name changed.