During the mid-17th-century Swedish Deluge campaigns, castle and town were burnt down completely. Upon the Second Partition of Poland in 1793, Przedecz was occupied by Prussian forces and incorporated into the newly established South Prussia province; it passed to the Napoleonic Duchy of Warsaw in 1807 and to Russian Congress Poland in 1815. From about 1824, a Protestant church was built by German settlers on the ruins of the medieval castle. The present town hall, a Neoclassical building, was erected in 1826. Other sites of interest comprise the early twentieth century Neo-Gothic parish church of the Holy Family by renown Polish architect Józef Pius Dziekoński. Przedecz was stripped of its town rights in 1867 as punishment for the Polish January Uprising. The town rights were restored in 1919, shortly after Poland regained independence in 1918.