[1] The hospital was apparently established in Gerardo's own house, which stood on the left bank of the River Lambro, near the bridge now called "San Gerardino" and the church of the same name.

After making an investigation, around 1582, Charles Borromeo, Archbishop of Milan, obtaining from Pope Gregory XIII confirmation of the cult of San Gerardo.

The traditional iconography represents him as an old bearded man, dressed in a tunic, with a staff from which hangs a bunch of cherries and at his feet a basket with bread, wine and eggs, or a bowl with a spoon, symbolizing his attempts to help the poor and the sick.

On this date, Monza celebrates his feast as the city's patron saint in the church of San Gerardo al Corpo, while at the nearby bridge of San Gerardino a festival takes place which prominently features stalls selling cherries, traditional iconographic attributes of the saint.

A few meters upstream from the bridge, the statue of Saint Gerardo, standing on his cloak, is placed in the river, in memory of the most famous miracle attributed to him.