sentences:  This Greek-Latin devotion became popular during the Middle Age when the Christian Europe gathered to defend itself from the Muslim invasions of the Ottoman Empire in 1572.Pope Pius V asked the Christian world to pray to Mary under the advocation of "Maria Auxilium Christianorum" to defeat the enemies of the Church.In this way, "Mary Help of Christians" is a military devotion, a "(...) powerful Virgin, great and illustrious rampart of the Church, wonderful Help of Christians", one that is "terrible as an army drawn up in battle array".