During a series of riots in this city, the Blues and Greens were two opposing groups. One building in this city is supported by "elephant's feet" and 
During a series of riots in this city, the Blues and Greens were two opposing groups. One building in this city is supported by "elephant's feet" and is named for its interior color. Enrico Dandolo redirected the Fourth Crusade to attack this city, the location where Belisarius slaughtered a mob in the Hippodrome during the Nika Riots. Mehmet II captured this city for the Ottoman Turks in 1453. For 10 points, name this capital of the Byzantine Empire, which was renamed Istanbul by the Ottomans.
During a series of riots in this city, the Blues and Greens were two opposing groups.
Constantinople [or Byzantium; or Istanbul before mentioned]