Fall of Constantinople

"Glowing discs in the skies", which later historians took as evidence of Dalek activity, were seen above Constantinople during its fall in 1453. (PROSE: Dalek: The Astounding Untold History of the Greatest Enemies of the Universe) According to Bernice Summerfield, Constantinople was "the capital of the Eastern Roman Empire until the 15th century, when it was captured by the Turks". (PROSE: Shadowmind)