Gour city, belonging to the Sassanid era was the first circle- shaped city of Iran which was established by the order of Ardeshir Babakan. The first archaeological excavations in this historical site have been started under the supervision of Dietrich, a German archeologist. This city had four main gates on each side including Mehr gate on the east, Bahram gate on the west, Hormoz gate on the north, and Ardeshir gate on the south. The archaeological achievements in the city of Gour are as follows:

A designed floor belonging to the early Sassanid era was discovered for the first time in the city of Gour.	The colors used in this floor have been remained intact which indicate the special attention to use various colors in architecture during the Sassanid era.	One of the other important archeological achievements in city of Gour was the discovery of seat area gate which is very similar to the Persepolis facades.
The design of one of Sassanid princes was discovered in the city of Gour.	The murals of four Sassanid princes have been discovered for the first time on one of the walls of the palace.	These four princes were consisted of two women, and two young men. The method used in this fresco shows the effect of the Parthian painting on the art of the bigging of the Sassanid era.