The first stone buildings were established between 1443 and 1450 by the Livonian branch of the Teutonic Knights[3][4] and construction continued till the end of the 16th century.

[citation needed] Construction started under the rule of the Master of the Livonian Order, Heidenreich Vinke von Overberg (1439 – 1450).

[6] Under Duke Friedrich, a new wing was added in 1590 with additional expansion in 1599, creating a modern residence with two massive round towers.

[6][8] During the Polish-Lithuanian wars with Sweden, Gustavus Adolphus captured the castle on 17 September 1625, thoroughly looting the "safeguarded" treasures of the surrounding nobility that had been stored there.

[6] Bauska Castle, during the reign of Duke Jacob, underwent repair of windows, doors, stoves, and modernized fortifications in 1647.