Msgr. Gerald Stessman will celebrate Mass at the Iowa State Fair on Sunday at 7:15 a.m. at Pioneer Hall. He will also celebrate Mass next Sunday, Aug. 17, at the same place and time. Msgr. Stessman will offer Mass on the holy day of obligation, the Assumption of Mary on Aug. 15, at 7:30 a.m. in Pioneer Hall at the Iowa State Fair.