Santa Maria in Cosmedin
In 1892, Callegari was offered the patriarchate of Venice but declined, recommending Bishop Giuseppe Sarto instead. He also served as President of "Società Scientifica dei Cattolici Italiani". Sarto, having been elected Pope on 4 August 1903, created Callegari Cardinal Priest of Santa Maria in Cosmedin in his first consistory, on the following 9 November.