From Vatican News:
Pope Francis will pray before an empty Square from the sagrato of St. Peter’s Basilica, the platform at the top of the steps immediately in front of the façade of the Church, as he explained when he made the announcement on Sunday and as he reiterated on Wednesday during the General Audience:
“We will listen to the Word of God, we will raise our supplication, we will adore the Blessed Sacrament, at the end I will impart the Urbi et orbi Blessing, and you will have the possibility of receiving a plenary indulgence.”
From 6pm Rome time, the ceremony will be broadcast live to the world by Vatican Media and can be followed in several languages on our website, on our Facebook page via Facebook Live and on our YouTube channel.
Vatican YouTube Channel: https://www.youtube.com/channel/UC7E-LYc1wivk33iyt5bR5zQ
Vatican Facebook Live Stream: https://www.facebook.com/vaticannews/