When the Pope celebrates mass tomorrow at Nationals’ Stadium, he will do so on an altar my buddies Ryan and J.P. designed and built.  They included in their design a spot in the wooden altar in which to insert an altar stone or “portable altar” (which contains the relics of martyrs and is the traditional, though no longer obligatory, place upon which to celebrate mass in the Latin rite.)  The Archdiocese, according to my buddies, has secured the  portable altar stone used by America’s first bishop, John Carrol, for use in the papal altar.