For 10 points, name this Turkish city on the Bosporous Strait whose previous names include Byzantium and Constantinople.
This city's Walls of Galata were demolished to accommodate its. growth in the 1870s. The historic core of this city is south of the natural harbor known as the Golden Horn. Architectural landmarks in this city include Topkapi Palace and a museum originally built as an Orthodox basilica, the Hagia Sophia. This city sits north of the Sea of Marmara and spans two continents, Europe and Asia. For 10 points, name this Turkish city on the Bosporous Strait whose previous names include Byzantium and Constantinople.
This city's Walls of Galata were demolished to accommodate its.
{Istanbul} [prompt on {Byzantium} or {Constantinople} before mention]