Cardinals hold last Mass before conclave ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page OSSERVATORE ROMANO/AFP/Getty Images The doors of the Sistine Chapel were closed Tuesday as the conclave began. VALDRIN XHEMAJ/EPA Blake smoke emerged from the chimney on the roof of the Sistine Chapel after the first voting session, indicating no pope had been chosen. OSSERVATORE ROMANO/AFP/Getty Images Cardinals entered the Sistine Chapel before the start of the conclave. Vatican CTV/Reuters The 115 scarlet-robed cardinals entered the Sistine Chapel. Vatican CTV/Reuters Cardinal Sean Patrick O'Malley took the oath of secrecy before the conclave began. Vatican CTV/Reuters The conclave comes after Pope Benedict XVI’s shocking resignation and revelations of corruption in the Vatican bureaucracy. GIAMPIERO SPOSITO/REUTERS People watched TV monitors in Saint Peter's Square as the cardinals entered the Sistine Chapel. OSSERVATORE ROMANO/REUTERS The cardinals were surrounded by Michelangelo’s imposing frescos imagining the beginning and the end of the world. AFP People gathered in St Peter's Square after the conclave began. EPA/MICHAEL KAPPELER Earlier in the day, the cardinals took part in the Mass ahead of entering the conclave for a papal election. GABRIEL BOUYS/AFP/Getty Images Cardinal Sean P. O'Malley of Boston prayed during the service. Spencer Platt/Getty Images The faithful received communion while attending Mass at St. Peter's Basilica. EPA/MICHAEL KAPPELER Cardinal Angelo Sodano (center left), dean of the College of Cardinals, held the Mass. Spencer Platt/Getty Images People attended the Mass at St Peter's Basilica. Spencer Platt/Getty Images Cardinals passed crowds as they exited St. Peter's Basilica.