Halshany or Holszany Castle (Belarusian: Гальшанскі замак, Lithuanian: Alšėnų pilis, Polish: Zamek holszański) is the ruined residence of the Sapieha magnate family in Halshany, Hrodna Voblast, Belarus and was the seat of the one of the largest land estates in the Grand Duchy of Lithuania. Paweł Stefan Sapieha commissioned its construction and it was erected circa 1610 to replace the older castle, built by of the Holszanski princely family, of whom Sapiehas were descendants and heirs.