The golden age of Jašiūnai manor began 200 years ago, in the first half of XIX century, when it became the residence of the Balinskiai and Sniadeckiai families. Balinskiai bought the Jašiūnai manor in 1811. On 1819 the manor belonged to Mykolas Balinskis, who was 24 years old. Already at that time, Mykolas Balinskis was a prominent personality - a graduate of Vilnius University, a member of the Shubravts or villains society, a member of the "Uolusis Lietuvis" masonic lodge and an author of many articles in newspapers and magazines.

The author of the palace project is the professor of Vilnius University, the head of the Department of Architecture, architect Karolis Podčašinskis. Podčašinskis

is known as the most famous representative of late classicism and at the same time the initiator of romantic architecture in Lithuania. The interaction of two styles - Empire and Romanticism characteristics of late classicism - is also embodied in Jašiūnai: the columns of the second floor of the palace follows ancient traditions and are typical for the Empire architecture, and the arch motives below them on the ground floor already exude romanticism.

The first floor of the palace was intended for economic needs, the second - for the life, work and rest of the owners of the manor. There was also a place for Sniadeckis library and archive.