to the west and its characteristics are as follows: length: 80 cm, height: 220 cm. The minaret has six windows of different sizes. The windows spread the light into the dark corridor. Brick and mortar are its main construction material. This monument has been inscribed on the national heritage list under registration number 1930. Sang Nebeshteh Sang Nebeshteh (inscribed stone) is an engraved cubic shape monument with 3.54 m heights located at the eastern part of KhorramAbad city. It dates back to 1119 AD during the Saljuq dynasty. It has been written in Kufic script and its subject is governmental rules of ShapurKhast, which is currently known as KhorramAbad city. The carved name of ShapurKhast city can be clearly seen on this monument. This name verifies the existence of ShapurKhast city during old days. It has been inscribed on the national heritage list. Pole Gap (Gap Bridge) Pole Gap is a Safavid multi-arch bridge passing through KhorramAbad city and located near to ShapurKhast castle. Its twenty arches, except its breakwaters and piles, are made from bricks and mortar. The height of the bridge is about 18 meters. Some of its arches are in the underground of the shops on either sides of the bridge. The bridge is very similar to Si-o-se-pol at Isfahan. About fifty years ago, an inscription has been found inside one of the ruined arches. The inscription has two meters length and 85 centimeters height. Probably, it has been written to protect the bridge form evil eyes and natural phenomena. Sahpuri Bridge (Tage Pil Eshkesa) Shapuri bridge has been constructed on KhorramAbad river (Gelal river) by the order of Shapur I during Sassanian period. It was built in the historic rout between Shapurkhast, Tarhan and Ctesiphon, the capital of Sassanian. Lorestan has more than 70 historical bridges, and form this perspective is considered as the capital of ancient Iranian bridges. Shapuri bridge has 312 meters length and elongated in the east–west direction. Some scholars believe that this bridge was the first gigantic bridge in Lorestan province, and other bridges in the province has been built by inspiring from it. It has 28 arches and 27 piles, with a surface area of 61 square meters. Currently, five of its arches are intact; the others have been destroyed by natural phenomena. The arches of the bridge are made in the form of a wishbone. The piles and breakwaters of