An octagonal baptistery from 1585, founded by Gregory Schmolian, made by Mateusz Gletger from Braniewo. It is a work of high class, a special value inlay intarsje (a kind of mosaic of stained wood). At the entrance, once surrounded by Corinthian columns, you enter the steps. On the door are the intriguing images of the Infant Jesus rising above the city and winged virtues in fancy robes. They are accompanied by the inscriptions Pax Vobis (peace be upon you) and Virtus invidiae victrix (virtue the victor of envy). The baptistery, coming from the same time as the baptistery, was lined with tin and decorated in 1691.