Leo XII (1823-1829)

Links are taken from the EWTN website

Charitate Christi - Extending the Jubilee Year 1825 (December 25, 1825)

Quod Hoc Ineunte - Proclamation of a Universal Jubilee for the Year 1825 (May 24, 1824)

Ubi Primum - On His Assuming the Pontificate (May 5, 1824)