The former main family seat of the Radoliński family of Greater Poland, Leszczyc coat of arms. Designed in the English Neo-Gothic style by the Prussian royal architect Friedrich August Stüler, commissioned by Władysław Radoliński. Built in the years 1848–1865. (Wikipedia)
The von Stiegler Palace dates from 1898-1899. It was built in an eclectic style with neo-Renaissance, neo-Baroque, and Art Nouveau forms. Unfortunately, the palace is not open to tourists 🙁
The castle was originally built in the 14th century. Later rebuilt several times. Currently, there is a complex of secondary schools and a museum of the Koźmińska region.