who said tear down this wall

The phrase "tear down this wall" was famously said by United States President Ronald Reagan. He uttered it on June 12, 1987, during a speech at the Brandenburg Gate in West Berlin. In the speech, Reagan called on the Soviet leader Mikhail Gorbachev to open and dismantle the Berlin Wall, which had divided East and West Berlin since 1961. The full line was: "Mr. Gorbachev, tear down this wall!" This speech is considered one of Reagan's most memorable moments and a defining point in the history of the Cold War.