Biden attends mass service at St. Matthew the Apostle ahead of inauguration Michael S. Rosenwald, The Washington Post Jan. 20, 2021 FacebookTwitterEmail President-elect Biden and Jill Biden pray at the Cathedral of St. Matthew the Apostle.Washington Post photo by Jabin Botsford WASHINGTON - Joe Biden's first stop Wednesday morning before becoming president was a Mass at the Cathedral of St. Matthew the Apostle, one of the most prominent Catholic churches in Washington D.C. Biden, just the second Catholic to become president of the United States, is deeply religious and attends Mass every Sunday, referring to his faith as "all about hope and purpose and strength."