Muslims turn towards Mecca several times a day in memory of its prophet. Don’t Christians have far more reasons to look to Heaven to remember the divine Redeemer and his Blessed Mother? The Church helps us remember them with the Angelus, a prayer recited at the sound of the bell in the morning, at noon and in the evening, to honor the Mother of God and also to meditate on the mystery of the Incarnation.
This custom of ringing a bell several times a day dates from the Crusades (1095). It was probably already the custom to remind the faithful by a bell in the morning that it was time to pray. Originally, the bell resounded in the morning half an hour before sunrise, and in the evening half an hour after sunset, to exhort the faithful to pray the Lord for the conquest of the Holy Land (Urban II, 1095). The noon ringing was established only later (Calixtus III, 1456).
At first people only recited one Our Father, later the Hail Mary was added. Then the Popes ordered three strokes (in honor of the Most Holy Trinity), and the recitation of a Hail Mary at each stroke, to ask the Mother of God for the defeat of heresies.
Translated from: Wordpress