Rate Field will host citywide Mass honoring Pope Leo XIV, the Archdiocese of Chicago announced. On Monday, a graphic installation will be unveiled at the ballpark at the location where the future pope cheered in Game 1 of the 2005 World Series.

The Cubs initially claimed Pope Leo as one of their fans on the Wrigley Field marquee, but his brother, John Prevost, has since confirmed that he roots for the White Sox, whose World Series win over the Astros in 2005 was their first championship since 1917.

It’s the biggest victory for the struggling Chicago White Sox in a long time. Pope Leo XIV is a White Sox fan — and the organization is embracing the news.