This week in Christian history: Pope Francis addresses Congress

By Michael Gryboski, Editor Sunday, September 21, 2025Speaker of the House John Boehner (R) and Vice President Joe Biden applaud as Pope Francis arrives to give his speech to the U.S. Congress in Washington, September 24 2015. | Reuters/Kevin LamarqueThroughout the extensive history of the Church, numerous events of lasting significance have occurred.Each week marks anniversaries of impressive milestones, unforgettable tragedies, amazing triumphs, memorable births and notable deaths. Some events, spanning over 2,000 years of history, might be familiar, while others might be unknown to many.The following pages highlight anniversaries of memorable events that occurred this week in Christian history, including Pope Francis addressing Congress, the death of Johann Agricola, and the end of the Investiture Controversy.Follow Michael Gryboski on Twitter or Facebook