Siege of Lyakhavichy (Lachowicze) took place from 23 March to 28 June 1660 during the Russo-Polish War (1654–67). Lachowicze was one of the major Grand Duchy of Lithuania strongholds in the disputed region (modern Belarus). A Russian army of about 30,000 under Ivan Nikitich Khovansky laid siege to the castle, defended by Mikołaj Judycki. After four failed siege, Khovansky was forced to face a Polish relief army under hetmans Stefan Czarniecki and Paweł Jan Sapieha, and was defeated at the Battle of Polonka. This meant the end of the siege of Lachowicze.