The Międzyrzecz Post Office was built at the turn of the 19th and 20th centuries in the neo-Gothic style characteristic of the period. These were times of rapid city development. Near the post office, a new building for the district office and the district treasury were constructed. Both buildings were located on the same street, which was then called Kirchstrasse, meaning church street. It owed its name to the oldest church in Międzyrzecz – the 15th-century Church of St. John the Baptist. Its walls were faced with red brick, and the architectural details were made of glazed green ceramic shapes. The front façade is asymmetrical. The right wing, slightly protruding towards the street, houses a pointed-arch entrance framed by a portal; it is crowned by a triangular gable decorated with blind windows, pinnacles, and floral ornamentation. The left wing has six axes. The windows are either pointed-arch or capped with segmental arches. The building still serves as a post office today.