Tuğrul Tower is a 12th-century monument, located in the city of Rey, Iran. Tuğrul Tower is near Rashkan Castle.
The 20-metre-tall brick tower is the tomb of Seljuk ruler Tuğrul Beg, who died in Rey in 1063. Originally, like other monuments of its time, it was capped by a conical dome, which would have added to its height. The dome collapsed during an earthquake.
The thickness of the walls varies from 1.75 to 2.75 meters. The inner and outer diameters are 11 and 16 meters, respectively. The exterior shape is that of a polygon with 24 angles in its design, which is thought to contribute to the structure's stability against tremors.
Coordinates 35°36'2.353" N 51°26'44.2" E