The retired former pope has been laying in state without the papal regalia, but will be buried in the traditional three coffins in the Vatican.
Former pope Benedict XVI passed away on Saturday after having fallen ill last week.
The Vatican had said in a statement on Wednesday that the former Pope had suffered a sudden "worsening" of his health.
Benedict, 95, in 2013 became the first pope in some 600 years to resign. He has been living in the Vatican since then.
Only one pope ever bore actual witness to a genocide and did absolutely nothing about it, and that was Eugenio Pacelli, Pope Pius XII.
The Vatican issued a letter by Benedict and a three-page addendum as victims lamented a lost opportunity for healing from a scandal that has rattled the worldwide Catholic Church.
The report, commissioned by the archdiocese, said there were at least 497 victims of abuse, mainly young males. Many other cases had probably not been reported, said the lawyers.