Photos: Pope calls Armenian slaughter an act of genocide

Pope Francis arrives in St. Peter’s Basilica at the Vatican to preside over an Armenian rite Mass on April 12.

(Gregorio Borgia / Associated Press)

April 12, 2015 1:13 AM PT

Supreme Patriarch and Catholicos of All Armenians, Karekin II, left, attends a papal Mass for Armenian Catholics at the Vatican on April 12.

(Andreas Solaro / AFP/Getty Images)

Pope Francis leads a Mass for Armenian Catholics in St. Peter’s Basilica in Vatican City on April 12.

(Andreas Solaro / AFP/Getty Images)

Armenian President Serzh Sargsyan, center, arrives to attend an Armenian rite Mass celebrated by Pope Francis at the Vatican on April 12.

(Gregorio Borgia / Associated Press)

Pope Francis, left, presides over an April 12 Armenian rite Mass at the Vatican to mark the 100th anniversary of the Armenian genocide.

(Gregorio Borgia / Associated Press)