Hermsdorf is a district of Berlin located in the borough of Reinickendorf. First mentioned in 1200, it was an autonomous municipality merged into Berlin in 1920 with the "Greater Berlin Act". During the Cold War, as part of West Berlin bordering East Germany, it was crossed by the Berlin Wall from 1961 to 1989 at its border with the municipality of Glienicke/Nor…Hermsdorf is a district of Berlin located in the borough of Reinickendorf. First mentioned in 1200, it was an autonomous municipality merged into Berlin in 1920 with the "Greater Berlin Act". During the Cold War, as part of West Berlin bordering East Germany, it was crossed by the Berlin Wall from 1961 to 1989 at its border with the municipality of Glienicke/Nordbahn.