One final miracle was needed for full sainthood and the case was investigated in Poland from 16 April 1998 until 26 June 1998 before receiving C.C.S. validation on 17 October 1998. The medical experts approved this case on 30 March 2000 as did the theologians on 1 February 2002 and the C.C.S. on 12 March 2002. John Paul II approved this - and the canonization - on 23 April 2002 while formalizing the date for the sainthood at a consistory of Rome-based cardinals on 7 March 2003. John Paul II canonized her in Saint Peter's Square on 18 May 2003 before a crowd of 50 000 people. The first miracle that led to her beatification involved the cure of Jan Kołodziejski on 26 March 1946 while the second miracle leading to beatification involved the cure of the nun (from Ledóchowska's own order) Magdalene Pawlak (in religious "Maria Danuta") on 16 April 1946. The decisive miracle that led to her canonization was the cure of Daniel Gajewski (b. 1982) who avoided electrocution in circumstances where he would otherwise have been killed had it not been for the late nun whom he saw moments before fading into unconsciousness on 2 August 1996. Since 2006 she has been the patron saint of Sieradz and since 2016 has been the patron of Pniewy. Ledóchowska is also the patron saint of Polish girls as well as orphans and educators.