1. The Hippodrome in Istanbul, also known as Sultanahmet Meydani, is a historic square that was once the center of politics and entertainment during the Byzantine and Ottoman Empires. It was built during the Roman era and then enlarged by Constantine in the 4th century. Some interesting features of the Hippodrome include the Egyptian Obelisk, the Serpent Column, and the German Fountain. The Hippodrome was also home to chariot races and athletic competitions during its heyday.

2. The Hippodrome is open to the public all day, every day. There is no admission fee or working time because it is an open square. There is no phone number available for the Hippodrome.

3. There is no ticket needed to enter the Hippodrome as it is a public square. It is located in the Sultanahmet neighborhood, which is easily accessible by public transportation such as tram, bus, or taxi. The closest tram station to the Hippodrome is Sultanahmet tram stop.