In the ancient environments of the former convent of Santa Croce are paintings, sculptures and, pottery (from the 13th century to the 19th century) belonging to the civic collections of the city. The archaeological room houses exhibits of the Lombard period unearthed in the Monferrato region. The Gallery from work done by sculptor Leonardo Bistolfi (1859-1933) consists of one hundred and seventy works: sketches, models made of terracotta, plaster, marble and bronze (admission fee).