Lithuania has strong roots in Pagan religion and that reverberates through art even to this day; basing many art pieces around nature, sun, animals, and trees. The folk art also incorporates lots of symmetrical patterns. Lithuania is also famous for its amber jewelry which ties in with trees and is a strong historical relic that dates back to the Grecian age when they were brought to Greece from the Baltic region even earning its name as the Northern Gold.
Egle the Queen of Serpents has a very strong tie around symbolism of trees and serpents. The mother and her children are all named after different trees in Lithuanian.
The portrayal of tree and snake symbolism even shows up in Norse cosmology as the holy tree containing all the worlds, Yggdrasil.