The LeavenThe Leaven is the official newspaper of the Archdiocese of Kansas City in Kansas. It is the successor to the Eastern Kansas Register, which was first launched in 1939. The Leaven provides weekly news to more than 186,000 Catholics in the archdiocese, which spans an area of 12,524 square miles in 21 counties, including those in the Kansas City area, Lawrence, Ottawa, Topeka, and Emporia. Much of the news reported in The Leaven is derived from the activities of the 105 parishes spread across those counties and their parishioners.