Ciechanow’s most popular tourist attraction is its medieval castle. Ciechanow’s castle was built at the turn of the 13th century, and it used to be one of Poland’s most splendid fortresses. Today the castle is in ruins and provides excellent views over the Świętokrzyskie Mountains.
Augustinian monastery and church was built in the 16th century in the late Gothic style. Church of the Birth of Virgin Mary was constructed in the first quarter of 16th century in late Gothic style.