 The celebration in great pomp of the secular jubilee of the first miracles of Our Lady of the Treille, in 1854 constituted a decisive step in this restoration work.The restoration project is also believed to have been marked by providence, due to the unexpected acquisition of the land on which the new church in honor of the Lady of the Treille would be built, making it possible to lay the church's foundation stone before the end of the jubilee celebration.In the middle of the 19th Century, in spite of the size of the town and the growing population of the surrounding region, Lille did not have its own bishop, but belonged to the Archdiocese of Cambrai.