The Catholic Church was founded in 1659 by the Italian missionary Martino Martini. The church sits west to east, covers an area of more than 900 square meters, according to the western "manufacturing system" construction, by the Baroque style, the plane is rectangular, three wide, 11 deep. The facade features a screen-like gable, two-storey baroque-style building with a bishop's palace to the southwest of the church. The Catholic Church is the largest and oldest church in Hangzhou. It is of great value to study the history of Chinese church architecture and Catholicism in Hangzhou.