The construction of the Pułtusk Town Hall, the seat of the municipal authorities, began at the beginning of the 15th century. It was supposedly founded in 1405, probably in a wooden form, by the bishop of Płock, Jakub Kurdwanowski. The Gothic tower added to the town hall a little later, serving both judicial and penitentiary functions as well as defense, was built as a brick building.
In the 16th century, a new, renaissance town hall building with an attic was built. It burned down several times during the wars in the 17th and 18th centuries. In 1728, it was rebuilt on the initiative of Bishop Andrzej Stanisław Kostka Załuski and survived until the end of the 19th century. At that time, in addition to the city authorities, the army was quartered in it, there was a detention center and even warehouses for Pułtusk merchants.
At the end of the 19th century, a poorhouse was organized in the ruined building, and from 1880 the ground floor and the tower were put into use by the Volunteer Fire Brigade. After 1902, a new, smaller, neo-Gothic building was erected on the site of the demolished building. During World War II, the fire station and the tower were partially destroyed. In the years 1947 - 1949, the tower was renovated according to the design of Mieczysław Rzepecki, while the fire station was demolished. The town hall tower has survived from the medieval seat of the municipal authorities of Pułtusk to the present day. In 1964, the Regional Museum was organized there, which is still located there today. Interestingly, the tower is located in the middle of the market square, which is considered the longest in Europe.