Palace of Blachernae
Istanbul, Turkey
The Palace of Blachernae (ὸ ἐ) was an imperial Byzantine residence in the suburb of Blachernae, located in the northwestern section of Constantinople (today located in the quarter of Ayvansaray in Fatih, Istanbul, Turkey). The area of the palace is now mostly overbuilt, and only literary sources are available as to its description.
Palace data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).