is a municipality in the district Märkisch-Oderland
, in Brandenburg
. It is situated 26 km east of Berlin
(centre). Rüdersdorf is famous for its limestone-open-pit mining. Today some parts of the mine are used as a museum (Museumspark Rüdersdorf
). Some famous buildings in Berlin such as the Brandenburg Gate
are built with limestone from Rüdersdorf.