The history of Ankara Castle is as old as the history of the city. It is not known exactly when the castle, which existed when the Galatians settled in Ankara and was repaired during the Roman period, was built. Hatip Stream, which flows next to the hill on which it was founded, is 110 m higher than Bent Stream. The castle has more than 20 towers. The outer castle surrounds Ankara in the shape of a heart. The four-storey inner castle is made partly of Ankara Stone and partly of collected stones. The inner castle has two large gates, one is called the Outer Gate and the other is the Citadel Gate. There is an inscription belonging to the Ilkhanids on this door. The inner castle consists of 42 pentagonal towers with heights varying between 14-16 m. There is an inscription in the northwestern part showing the repairs made by the Seljuk ruler. Today, there are many houses left from Ottoman Ankara inside the castle. Some of these have been repaired and turned into restaurants, shops, etc. It is used as.