Giovanni Maria Bernardoni (1541–1605) was a Jesuit and an Italian architect who was the first to design the Baroque style in Poland and the Grand Duchy of Lithuania.

The Chief Vicar of the Province Bernardoni was in at the time wrote about him to the Superior General of the Society of Jesus saying: "We are happy that God has gladdened us by giving us this master who was essential in helping Father Giovanni".

In 1583, by command of the head of the Jesuit Order, Bernardoni was sent to the Grand Duchy of Lithuania where Prince Nicholas Radziwill had already been asking for an architect for a long time.

However, he wasn't able to make it to his new assignment since on the way there, Bernardoni was taken in Lublin by the rector of the Gdańsk Jesuit College, Christopher Warszewicki who was very influential in Poland.

There was also established two separate entrances to the crypt-dungeons, where different parts of the dungeon held the coffins of princes, monks, and eminent members of the community.

Over the years, many churches in Nyasvizh were simplified, redone, and had additions made to them especially in the middle of the 18th century, but the stylistic basis of the building, both inside and outside remains unchanged since the times of Bernardoni.

This is thanks to the exclusive interest of Radziwiłł's in the project, who did not allow interruptions in the construction, who promptly gave money to such an extent that in the end amounted to more than the previously agreed cost.