LONDON — Sarah Mullally walked into St. Paul's Cathedral on Wednesday morning as the bishop of London. When she walked out in the afternoon as bells rang out, she was the spiritual leader of millions of Anglicans around the world.
Mullally, 63, became the archbishop of Canterbury, making her the first woman to lead the Church of England. The worldwide Anglican Communion, which includes the Episcopal Church in the U.S., has no formal head, but the archbishop traditionally has been seen as its spiritual leader.
As the choir sang an anthem by Edward Elgar, the cancer nurse turned cleric officially took up the responsibilities of her new job as bewigged judges presided over a legal ceremony confirming her appointment, which was announced almost four months ago.
As the lengthy process came to a close and her election was confirmed, Mullally stood and faced the congregation to loud applause.
''We welcome you,'' the bishops surrounding her shouted in unison.
The so-called Confirmation of Election service marks a major milestone for the Church of England, which ordained its first female priests in 1994 and its first female bishop in 2015. The church traces its roots to the 16th century when the English church broke away from the Roman Catholic Church during the reign of King Henry VIII.
George Gross, an expert on theology and the monarchy at King's College London, highlighted the church's continuing divergence from the Catholic Church, which forbids women from being ordained as priests, much less as serving as the religion's global spiritual leader.
''It is a big contrast,'' Gross said. ''And in terms of the position of women in society, this is a big statement.''