Tuhia he tomokanga mo tenei pene - I whakatairangahia a Mistrangelo ki te apiha nui o Florence i te 19 o Hune 1899, a ka mahi hei rangatira nui o nga Piarists mai i te 1900 ki te 1904 hoki. I hangaia ia e Pope Benedict XV hei tohunga karaka o S. Maria degli Angeli i te consistory o te 6 o Tihema 1915. Ko ia tētahi o ngā kaitiaki pōti i whai wāhi ki te kōhanga pāpa i te tau 1922
, i whiriwhiria ai a Pope Pius XI.