What is cross with m symbol?

The cross with an "M" symbol, also known as the Marian Cross, is a symbol that represents both the cross of Jesus Christ and the devotion to the Virgin Mary. The "M" in the middle of the cross represents Mary, who is considered the mother of Jesus and a powerful intercessor for Christians. The Marian Cross is often used in Catholicism and is a popular emblem for churches, chapels, and religious organizations dedicated to Mary. It is also commonly worn as a pendant or medal by devout Catholics as a sign of their devotion to the Virgin Mary.