The Roman Catholic Diocese of Owensboro is celebrating its 75th Jubilee with several free events. The celebration Saturday begins with a Mass at the Owensboro Sportcenter, then moves to the RiverPark Center for concerts, food, children's activities and tours of the International Bluegrass Museum. The newly renovated St. Stephens Cathedral in Owensboro will be open for tours for much of the day. 32 western Kentucky counties make up the diocese, which was formed in 1937 by Pope Pius XI. It is home to 79 churches.