A walking tour through the fascinating alleys of the historic centre. Visit to the Cathedral with Julius II’ s intarsia choir and to the Sixtine Chapel commissioned by pope Sixtus IV as a mausoleum for his parents. Our Lady of the Castle’s oratory with the monumental polyptych by V. Foppa and L. Brea and the Town Gallery with the works of art commissioned by the Della Rovere family are certainly worth a visit.