The monastery church of the Franciscans was built by Jakub Wejher in 1650. It is one of the oldest monuments in the town with preserved original without greater changes lump. The only special intrusion was "the prolongation" of the church for few meters in XVIII century. It was caused by the choir construction and bringing the pipe organs to the church. It was possible due to the change of Franciscans monastery formula according to which they thought that one of the only and greatest instrument daring to prize the God is human voice. That is why in the Franciscans churches organs were not used. In XVIII century the ban was lifted and count Ignacy Przebendowski funded building the choir and the church "prolongation". The built part is visible from the outside. It only differs in the windows style and in the character of the used material; the Franciscans church is from brick, the built fragment is plastered.


The lump of the temple is built in the cross shape. It has unique baroque facade and rich interior: 5 late-baroque altars (the main altar Christ crucifixion), rococo patronly lodge, and pulpit, incrusted cupboards in the vestry and the paintings with perfect XVIII century Pieta and the painting presenting the founder of the city with his wife.

The most precious treasure of this church is the picture of Wejherowski's Soul and Body Healer Heavenly Mother famous for grace which is probably 17th Century painter Andrzej Stecha authorship. In the picture Heavenly Mother is holding the Infant Jesus in her left hand and in her right one she has the golden scepter. Mary's face has pronounced features of a young beautiful lady. Her right ear is adorned with an earring and it is so exposed as if she were listening to the believers' requests. Mary's feet covered with sandals are stamping the snake which is slithering on the globe. Next to the feet there is visible the golden horn of the crescent with human face on it. Infant Jesus is holding in his left hand blue orb and in his right one a red rose (the roses are also in the Wejher's blazon. On the Head of Mary and the Infant Jesus there are golden crowns inset with precious stones. These crowns were ceremoniously sacred and put by the pope John Paul II on 5th June 1999 on the Sopot's Hippodrome.