the &quot;Mater Ecclesiae&quot; mosaic.Apostolic Palace in vatican Covering a window facing the square, the &quot;Mater Ecclesiae&quot; mosaic was commissioned by Pope John Paul II in thanksgiving to the Virgin Mary after the assassination attempt.<br /> Pope Francis  during mass for priests as part of the Jubilee Year of Mercy in St. Peter square at the Vatican,June 3, 2016.
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