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.