On 25 May 1914, della Chiesa was created a cardinal, becoming Cardinal-Priest of the titulus Santi Quattro Coronati, which before him was occupied by Pietro Respighi.
Pada 25 Mei 1914, della Chiesa diciptakan kardinal, menjadi Kardinal-Imam dari titulus Santi Quattro Coronati, yang sebelumnya ditempati oleh Pietro Respighi.