Impressive Azadi Tower was established in 1971 in Tehran to memorialize the 2500th anniversary of the first Persian Empire. Since then the tower has become the symbol of Tehran. The tower was designed by Hossein Amanat, and its architecture is a combination of the Achaemenes, Sassanid, and Islamic periods. The monument was formerly known as Shahyad Tower, but its name was changed after the Iranian Revolution in 1980. This three-story structure has four elevators, as well as a staircase. There are several salons, galleries, libraries and museums in the basement. It might be interesting to know that 8000 pieces of white marble have been used in constructing this tower. Hossein Amanat, the architect of the tower stated that “the tower mirrors the glory of Iranian history, the time when Persia was the pioneer of literature, art, architecture, handicraft and various science. I wanted to do my best in constructing the tower, so that whoever comes from abroad or even Iranians know where and which culture this monument comes from”.