The construction of a brick church in Kościelna Jania is attributed to the Teutonic Order around 1355. Until the sixteenth century, the church performed under the invocation of Saint Nicholas, patron of merchants and sailors. Around 1538, the nave of the church was destroyed, which was first rebuilt from wood. It was not until 1622 that a new brick corpus was erected at the initiative of Jan Kostka.
From the original medieval church, a huge, buttressed, four-storey defensive tower survived. Inside the church, one can see a 14th-century gothic, carved out of stone, font.