Mr. and Mrs. John Dierdorf of North Tonawanda celebrated their 55th wedding anniversary with a gathering for family and friends at their home. Mr. Dierdorf and the former Dolores Ann Sopczuk were married Oct. 11, 1958, in St. Joseph’s Catholic Church in North Tonawanda. He is a retired North Tonawanda police captain. She is a retired children’s day care provider. They had four children and five grandchildren.