 At that time it was the seat of a castellan, and a market center, located near the Vistula crossing.In 1205, the Battle of Zawichost was fought nearby, in which Roman the Great of Kingdom of Galicia–Volhynia was defeated by Lesser Poland’s army of Leszek I the White, and Mazovian army of Konrad I of Masovia.It is not known when Zawichost was granted town rights, most probably it happened before 1255.