One story suggests that, during a visit to Kościelec in 1238, Hyacinth led the people to pray after a storm had destroyed the village crops; after the crops miraculously flourished the next day, the townspeople gave Hyacinth the gift of pierogi. Another story goes that, following the Tatar invasion, a famine spread across the land, and Hyacinth is credited with distributing pierogi to the hungry people.