Robert Prevost has been elected the first pope from the United States in the history of the Catholic Church. The Chicago-born missionary took the name Leo XIV.

The new pope said he would be guided by a key document that his predecessor wrote listing the church’s priorities, including a “loving care for the least and the rejected.”

The U.S. is one of only a handful of countries that taxes citizens living abroad. Thus, thanks to his American passport, the 69-year-old Chicago-born pope, known until last week as Robert Prevost, will likely need to file a tax return to the U.S. government just like any other citizen, experts told Fortune.

Abuse watchdog groups have expressed concern, but Leo has been lauded by other survivors for his handling of abuse.

The elevation of Chicago-born Cardinal Robert Prevost to pope earlier this month has been a point of pride for Chicagoland parishes, including in the north suburbs of Morton Grove, Park Ridge,

The 73-year-old Florida man appears to be a staunch Trump supporter who uses his Facebook account to go on the attack.

Pope Leo also celebrated Mother’s Day as jubilee bands and thousands of pilgrims created a festive atmosphere in St. Peter’s Square on Sunday.