| Date Served | Pope |
| September 15-27 1590 (13 Days) | |
| April 896 (16 Days) | |
| October 25-November 1241 (17 Days) | |
| December 897 (20 Days) | |
| January 15-February 4 708 (21 Days) | |
| April 9-May 1 1555 (22 Days) | |
| July 17-August 9 1048 (24 Days) | |
| September 22-October 18 1503 (27 Days) | |
| April 1-April 27 1605 (27 Days) | |
| May 22-June 23 964 (33 Days) | |
| August 26-September 28 1978 (34 Days) | |