Which of the two is situated in the Eyup district of Istanbul, Eyüp Sultan Mosque or Column of Marcian?
Eyüp Sultan Mosque:  The present building dates from the beginning of the 19th century. Column of Marcian: The Column of Marcian (Turkish: "Kıztaşı" ) is a Roman honorific column erected in Constantinople by the "praefectus urbi" Tatianus (450-c.452) and dedicated to the Emperor Marcian (450-57). Column of Marcian:  The column is not documented in any late Roman or Byzantine source and its history has to be inferred from its location, style and dedicatory inscription.
i don't know