Meyendorff Castle or Maiendorf Castle (Майендорф or Майндорф) is a Châteauesque architectural extravaganza constructed in the Neo-Gothic style at the turn of the 20th century in Barvikha near Moscow to Pyotr Boytsov's designs as a private residence of the Meyendorff family (a cadet line of the Baltic German noble house of Uexküll). After the outbreak of World War I the owners of the castle left Russia.