Hoover is the name of the 31st president of the United States, and he was also an early graduate of Stanford. In 1919, he donated $50,000 to establish the Hoover Research Center. The Hoover Tower was built during Stanford's 50th anniversary. It 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. It mainly studies the social, political, and economic changes in the world and advocates peace. The Hoover Tower is open to teachers, students, and friends of the school for free, and charges a small fee for external visitors. On the first floor is a brief biography of Hoover and related historical materials. You can take the elevator to the top floor, where you can enjoy the view of the entire Stanford campus.