Mary Help of Christians (in Latin Sancta Maria Auxilium Christianorum), is a Roman Catholic devotion created to the Virgin Mary. John Chrysostom was the first person to use this title in 345. The devotion became popular in Europe during the pontificate of Pope Pius V and the fights against the Ottoman Empire. It was definitely established due to the great appreciation of Don Bosco for this Marian title and the development of the Salesian works in several countries since the second half of the 19th century. Although it is commonly associated to the Roman Catholic Church, the Orthodox Church knows also the devotion since 1030 in Ukraine, when the country was defended from a barbarian invasion.