Kazimir (Konstantin) Kostantinovich Medunetsky (Константин Константинович Медунецкий; 1899, Moscow - c1935) was a Constructivist sculptor and stage designer. He studied under Vladimir Tatlin and Alexander Rodchenko at Vkhutemas (Higher Art and Technical Studios) and was a founding member of OBMOKhU (Society of Young Russian Artists) in 1919.
Spatial Construction (formerly Construction No. 557), 1919, in Yale University Art Gallery, is his only surviving sculpture.
Spatial Construction (Construction No. 557), 1919. Tin, brass, painted iron, and steel. 46x18x18 cm (with base). Yale.