The only act of his pontificate was the suspension of the constitution Ubi periculum about the conclave.
Although the first election following Ubi periculum observed its rules and took only one day, its application was suspended and the elections of 1277, 1280–1281, 1287–1288, and 1292–1294 were long and drawn out until Pope Celestine V (another non-cardinal and relative outsider) reinstituted the law of the conclave.
Ubi Primum | Ubi Caritas | UBI World TV | Ubi Primum (Pius IX, 1849) | Ubi Primum (Pius IX, 1847) | Ubi periculum | Ubi Dwyer |