Career
Born in Milan, Marelli was appointed bishop of Bobbio by pope Pius X in 1907 and in 1914 after the death of Giacomo Maria Radini-Tedeschi he was transferred to the see of Bergamo.
Born in Milan, Marelli was appointed bishop of Bobbio by pope Pius X in 1907 and in 1914 after the death of Giacomo Maria Radini-Tedeschi he was transferred to the see of Bergamo.