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Nuns watch the arrival of a truck transporting a huge Christmas tree at St Peter's square on November 23, 2017 in Vatican. This year's the Christmas tree that will adorn St Peter's square is a giant, 28 metre high red fir given, by the archdiocese of Elk, in north-eastern Poland. It will be inaugurated on December 7, 2017. / AFP PHOTO / Andreas SOLARO