Page "Pope Benedict XI" Paragraph 4

( Note on numbering: Pope Benedict X is now considered an antipope.

At the time of the election of Benedict XI, however, this status was not recognized, and the man the Roman Catholic Church officially considers the tenth true Pope Benedict took the official number XI, rather than X.

This has advanced the numbering of all subsequent Popes Benedict by one.

Popes Benedict XI through XVI are, from an official point of view, the 10th through 15th popes by that name.