Press Photos by Tim GilmanThe Roman Catholic Allentown Diocese, with Artsquest's help, held an outdoor noon celebratory Mass Sunday at Steel Stacks. The Mass commemorated the visit of His Holiness Pope Francis to the United States to attend the World Meeting of Families in Philadelphia. Bishop Emeritus Edward P. Cullen led the special Mass on the Levitt Pavilion stage. An estimated 800 Lehigh