Column of Justinian (monument) built
543 CE.
Shown on the map at 41.008°, 28.979°.
The Column of Justinian was a Roman triumphal column erected in Constantinople by the Byzantine emperor Justinian I in honour of his victories in 543. It stood in the western side of the great square of the Augustaeum, between the Hagia Sophia and the Great Palace, and survived until its demolition by the 1509 Constantinople earthquake, which affected other historical places as well.
Text from the Wikipedia article Column of Justinian, licensed CC BY-SA 4.0.