The Assisi Diocesan Museum, in the city of Assisi, was founded in 1941 by bishop Giuseppe Placido Niccolini to preserve the most important works of art of the Assisi Cathedral and of several oratories of Assisi's confraternities. The museum is located underneath the piazza of the cathedral and has a collection consisting of about 300 works of which 100 are on display, exhibited in the museum's nine sections.