Seredžius is located on the right bank of the Nemunas River, between the Dubysa and the Armena rivers, near the picturesque road Kaunas – Jurbarkas – Klaipėda. The first settlement in the area has been settled a long time ago and there is no exact knowledge of it. At the confluence of the Nemunas and the Dubysa people have been inhabited since the Stone Age. Archaeological excavations have found Neolithic work tools and tombs from the 5th to 7th centuries. According to written sources, the area was first mentioned during the Lithuanian battles with the Crusaders. Along the Nemunas River new castles were built and fortified, which formed a united defense system.