The Museum of St. John of Nepomuk boasts an interesting collection of art works and devotional objects from the 18th–20th centuries, documenting the variety and richness of the cult of St. John of Nepomuk. St. John of Nepomuk was a significant historical figure whose life and death gave rise to a moral and spiritual heritage that quickly spread – mainly thanks to the Jesuit Order – all around the world. The cult of our most famous saint and the country’s patron saint significantly influenced both the fine arts in Bohemia, and the various artistic renderings speak of the religious respect he has won over the centuries, and which is alive to this day. The exhibition that can be found on the ground floor of the Nepomuk Archdeanery refers to the legacy of the late Dean of Nepomuk, Archdean P. Jan Strnad, who in 1930 established the Museum of St. John of Nepomuk and Other Church Relics, which was closed down by the communist regime in 1950.

The Archdeanery is a prominent Baroque structure with a tall mansard roof. According to the tithe collection records, the Nepomuk Presbytery dates back to 1369. However, it is likely that it was established soon after the construction of the Church of St. Jacob, i.e., as early as in the 12th century. In 1620, the presbytery was elevated to a deanery. In 1746, the building was severely damaged in an extensive fire, and in the same year plans to restore the building were drawn up by Kilian Ignac Dientzenhofer. The structure was again damaged by fire in 1800. In 1912, the old stalls were torn down and a year later they were rebuilt according to their original ground plans. In 1929, on the occasion of the anniversary of St. John of Nepomuk, the structure was elevated to an archdeanery.