| Quo graviora mala | |
| Type: | bull |
| Pope: | Leo XII |
| Language Of Title: | latin |
| Translation Of Title: | The graver the evils |
| Signature Date: | 13 March 1825 |
| Subject: | Condemnation of Freemasonry |
| Web La: | https://www.vatican.va/content/leo-xii/it/documents/bolla-quo-graviora-13-marzo-1825.html |
| Web En: | https://www.papalencyclicals.net/Leo12/l12quogr.htm |
| Before: | Quod Hoc Ineunte |
| After: | Exultabat Spiritus |
Quo graviora was an apostolic constitution promulgated by Pope Leo XII on 13 March 1825, in which he decreed the prohibition of membership in Masonic lodges in perpetuity.