Hoover, who was named the 31st president of the United States, was also an early Stanford graduate. In 1919, he donated $50,000 to establish the Hoover Research Center. Hoover Tower was built during Stanford's 50-year school year, became part of the research center and was named after Hoover. The Hoover Research Center is one of the most influential research centers in the United States, which mainly studies social, political, economic changes in the world and advocates for peace. The Hoover Tower is free to teachers and students and friends, and charges a small fee for visitors. On the first floor is a life profile of Hoover and related historical information. The elevator can reach the top floor, where you can enjoy the entire Stanford campus.