Among the most notable of his works are four plafonds of the four seasons in the Wilanów Palace. Siemiginowski established his own school of painting in Wilanów and was a renowned architect (co-designer of the Town Hall in Żółkiew (Zhovkva) among others). Many of his religious paintings in Warsaw (Crucifixion in the Holy Cross Church, Transfiguration in the Capuchin Church among others) were destroyed during the extensive bombardment of the city by the Germans in 1944.
Among notable works are four ceiling murals representing the seasons in Wilanów Palace. Siemiginowski established his own school of painting in Wilanów and was a renowned architect (co-designer of the Town Hall in Żółkiew among others). Many of his religious paintings, such as the Crucifixion at Holy Cross Church and Transfiguration at Capuchin Church, were destroyed during the extensive bombardment of Warsaw by the Germans in 1944.