His wife from the Śniadecki family initiated construction of the neoclassical Jašiūnai Manor, designed by architect Karol Podczaszyński.

The manor became a cultural center: it was a residence of Jan Śniadecki and Juliusz Słowacki frequently visited by Adam Mickiewicz, Tomasz Zan, Stanisław Bonifacy Jundziłł, Józef Mianowski.

This generation of Polish Romantics studied and idealized the history and culture of the former Grand Duchy of Lithuania.

[6] These studies had great influence on the worldview of the szlachta of the Vilnius Region: they would identify themselves as Poles while remaining loyal to the Grand Duchy.

As part of the Wilno Voivodeship, Jašiūnai belonged to the Second Polish Republic during the interwar period.

In September 25, 1941, the Jews of Jašiūnai were shot, together with those from other villages by the Special Squad of the German Security Police and SD.

The coat of arms depict a silver column in a red shield with two golden stars on each side.