Tuğrul Tower is a 12th-century monument, located in the city of Rey, Iran. Tuğrul Tower is near Rashkan Castle. The 20 meters 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.