Maria Faustyna Kowalska , commonly known as Saint Faustina ( born Helena Kowalska , 25 August 1905 in Głogowiec - 5 October 1938 in Kraków , Poland ) , was a Polish nun who has been canonized as a saint by the Roman Catholic Church .
Maria Faustina Kowalska , commonly known as Saint Faustina , born Helena Kowalska ( August 25 , 1905 , Głogowiec , then in the Russian Empire - October 5 , 1938 , Kraków , Poland ) was a Polish nun and mystic .