Church was finished to construct at 1767 in baroque style. Italian Antonio Paraco designed it. In fact, this place was planned to be main seat of Bishop of Kingdom of Poland and Grand Duchy of Lithuania.
It is pity I haven’t been inside, as priest had service somewhere outside church and kept it locked.
Von Plater family constructed palace and park around at middle of 18th century. It was used for residential purposes. Later it was rebuilt and was used as school at soviet times. It is quite neglect now, seems that after taking care of such place it could be great destination for visitors of Latgala region.
Try to time your visit to Krāslava on a Sunday (it makes a nice day trip from Daugavpils), since the churches tend to be closed on other days.
Saint Donat's was built to be the seat of Bishop of Inflanty (Polish Livonia) between 1755 and 1767 by the Italian architect Antonio Paraco at the behest of Konstanty Ludwik Broel-Plater.
The Polish government paid for the recent restoration of the altar painting by Jan Matejko -- and discovered a fresco of even greater value by Filippo Castaldi.
The Aleksandr Nevsky Orthodox Church, also commissioned by the Platers, is nearby.