'Two popes' at Holy Door opening

(ANSA) - Vatican City, December 7 - Benedict XVI will attend the ceremony on Tuesday when Pope Francis opens the Holy Door of St Peter's Basilica to start the Catholic Church's extraordinary Jubilee of Mercy.
    Benedict, who stepped down from the helm of the Church in 2013, never opened the Holy Door during his eight-year papacy.
    Italian President Sergio Mattarella and Premier Matteo Renzi are also set to take part in the ceremony, amid a massive security operation in the wake of last month's terrorist attacks in Paris.