Geographically located in the southern part of Bushehr, Rey Shahr is a historical monument attracting a lot of visitors every year. Due to its geostrategic location, the city was one of the connecting junction between the east and west part of the ancient world. The objects excavated in Rey Shahr date back to 3rd to 1st millennium BC. In 1914, a French archeologist found many other items there such as inscriptions of the Elam king and patterned potteries. According to the inscriptions, Rey Shahr was called Lian during Elamite and was one of the most important cities of that kingdom. Ardashir the Unifier founded many cities during his kingdom, Rio Ardashir was one of them which is believed to be the reconstruction of the ancient Lian. During Sassanid dynasty, Rey Shahr was an important center for literature and science and many scientists and writers used to live there. The city was prosperous for centuries after the advent of Islam. It seems that Rey Shahr owned two thousand residential units in the 16th century and then the population of the city was transferred to Bushehr when Nader shah was ruling Iran under Afsharid dynasty. The magnificent historical ruin of Rey Shahr is fully explored by Alaedin Travel Bushehr tour.