who said mr gorbachev tear down this wall

The phrase "Mr. Gorbachev, tear down this wall" was said by United States President Ronald Reagan. He delivered this famous line on June 12, 1987, during a speech at the Brandenburg Gate in West Berlin, calling on the Soviet leader Mikhail Gorbachev to open the Berlin Wall, which had separated East and West Berlin since 1961. This speech is considered one of Reagan's defining moments and a significant moment in Cold War history, symbolizing a call for freedom and the end of Soviet oppression in Eastern Europe.