The tower is located in the Shahr-e Ray and dating back to Seljuk time. It is around 48 m. made with brick and adobe. It looks like and functions as a clock, and the reflection of sun’s beams on the 24 triangular ridges, helps determine the time. When the sun shines from east, slowly one of the ridges is lighted. With passing of each hour, one more of the ridges is lit until sun reaches its highest place. In this time, sun is exactly above the southern entrance of the structure. Tughrul tower has another entrance on northern side, exactly opposite of the other one and both align to the prime meridian. Together with the arches all the elements of the tower follow a style of architecture known as Razi and notable for combining the pre-Islamic features with Islamic ones
