Kybartai began to grow rapidly in the middle of XIXth century when railway line to Koenigsberg was built and border station was established. In late XIXth century 1/4 of all foreign trade of Russian empire went through Kybartai. Township had a lot of military and very mixed population - many Jews, Germans, Russians, Lithuanians, Poles, etc. Probably the hardest period for Kybartai was the years 1940 - 1990 when it lost on border position and consequently importance. After 1990 Kybartai began to feel themself as an important town again (despite the fact that has only 6000 residents). Kybartai is very mixed stylistically town due to it's complex past.