Painting by Fra Angelico
Today is the day in which we ask through all the saints known and unknown to intercede for us. I will remember you all at Mass today. Through them we honour Christ, true God and true man, the Redeemer and Saviour of mankind, who through His Holy Mother Mary gave them all the graces they needed for them to be today in Heaven.
The earliest certain observance of a feast in honour of all the saints is an early fourth-century commemoration of "all the martyrs." In the early seventh century, after successive waves of invaders plundered the catacombs, Pope Boniface IV gathered up some 28 wagonloads of bones and reinterred them beneath the Pantheon, a Roman temple dedicated to all the gods. The pope rededicated the shrine as a Christian church. According to Venerable Bede, the pope intended "that the memory of all the saints might in the future be honoured in the place which had formerly been dedicated to the worship not of gods but of demons".
The Anglo-Saxon theologian Alcuin observed the feast on November 1 in 800, as did his friend Arno, Bishop of Salzburg. Rome finally adopted that date in the ninth century