The Transfiguration Cathedral or Saviour-Transfiguration Cathedral (Ukrainian: Спасо-Преображенський собор) is the oldest building in Chernihiv, Ukraine, and one of the few surviving buildings of pre-Mongol Rus.

Construction of the cathedral was started by Prince Mstislav of Chernigov, and legend states that when Mstislav died in 1035 or 1036, the height of the walls were equal to the height of a horseman.

The current exterior stems from the end of the 19th century.

[2] The architecture is unusual as it combines elements of a Roman basilica with a typical Byzantine church.

[2] The cathedral has been on the UNESCO World Heritage Site tentative list since 1989.