The medieval Bauska Castle, built as a 15th-century fortress with a royal residence for the Dukes of Courland and Semigallia added on in the late 16th century. Bauska is an excellent example of the defensive stone castles erected during the Middle Ages to protect Latvia's territory from attacks by Christian crusaders. See the cannons and other defenses used by medieval Latvians, and learn about the social customs and fashion sense of the royal court.
Two palaces built in the 18th century for the same family, the Dukes of Courland and Semigallia, by Italian architect Francesco Bartolomeo Rastrelli, who also created Russia's ornate Winter Palace and Tsarskoye Selo Palace for the tsars:
Rundale Palace - like a time capsule of 18th-century royal Latvian life, with beautifully preserved and restored Baroque architecture and Rococo art. Don't miss a stroll through the massive French-style gardens outside the palace!
Jelgava Palace - burned during the War of Independence in 1919 and heavily shelled during World War II. The Baroque-style palace was reconstructed in 1961 and is currently home to the Latvian University of Agriculture. Make sure to visit the crypt for members of the royal family who once lived here, which houses their ornate sarcophagi.