This church, built in the 1830s near Karlovo Square by Prague architect Kilian Ignaz Dientzenhofer, is an important high Baroque monument. The church’s altar features a statue of John of Nepomuk from 1682 by Jan Brokoff – the wooden model for the statue on the Charles Bridge.
Source: https://www.prague.eu/en/object/places/2300/church-of-st-john-of-nepomuk-on-the-rock-kostel-sv-jana-nepomuckeho-na-skalce