This huge obelisc is really 1/3 of the original egyptian one. Teodosios brought it from Egypt, but it was broken and only the upper part is kept.
At the basement you can see reliefs in stone of the former Hippodrome scenes. At this pic you can see the Emperor having “A day at the races”.
Favorite thing: This is the smallest of the 3 columns at the Hippodrome. Is easy to find, is the central black column. It was made originally by the greeks in 479 BC as a gift for having defeated the persians in the Platea battle and offered to Apollo in Delphi. Constantine the Great brought this pedestal to Istanbul. It had 3 serpent heads, 1 of which is now at the Archeological Museum.
Favorite thing: Visit the Hippodrome, right next to the Blue Mosque. The Obelix seen here was erected in the 4th century.