There are interesting ancient buildings in Chankasem palace namely:
The wall and the palace gate: At present, there are brick wall decorated with heart-shaped boundary marker. There is one door on each side so altogether there are four doors for four sides.
Pavilion in tetrahedron style: It is located near the East palace gate and made of wood.
There are 3 porticos in the front and another 3 porticos at the back. At first, it was used as the hall for an announcement of governable issues and the residence. Later, it displays ancient items and is now called Ayutthaya Museum. At present, it exhibits the private royal tools and equipments which were originally used in this palace.
Phra Thinang Piman Rattaya: It exhibits sculptures made from Sila stone. They are made in god figures and Buddha image with the Nakha above in Lopburi style, the Buddha image made from bronze in Ayutthaya period, votive tablets and carved wooden items.
Phra Thinang Pisai Sayyalak or Hor Song Klong: It is 4-storey tower which is used to observe stars and constellations. Now it displays five permanent exhibitions which are about Ayutthaya architecture, baked pottery and import-export Ayutthaya goods, weapons, items related to Buddhism and the old city people lifestyle.