| Styles of Basile Petros IV Avkadian | |
|---|---|
 | |
| Reference style | His Beatitude |
| Spoken style | Your Beatitude |
| Religious style | Catholicos |
| Posthumous style | Not Applicable |
Basile Petros IV Avkadian (in Armenian Բարսեղ Պետրոս Դ. Աւգատեան ) was an Armenian Catholic Patriarch from Aleppo, Syria from 1780 until 1788. It was said of him that "[H]e never took off his monachal garment when he was bishop and Catholicos".[1]