All Saints

All Saints is the short version of All Saints' Day, which is a Christian feast of the Catholic and Anglican churches. Purpose of the feast is to magnify God and all Saints, may they be known or unknown. Originally, there were several days in remembrance of martyrs who died unknown or in groups, but eventually all saints were included, and Pope Gregory announced the All Saints' Day in 837, which is celebrated on the first of November in western Christian churches. Even in the Protestant churches it's celebrated, but they state that all believers, who received the baptism, are saints like it is written in the New Testament. The preceding evening is celebrated in some western countries as Halloween.[1]

In the Eastern Churches it's not celebrated on November 1, but on the first Sunday after Pentecost (Whitsun). [2]

The Forerunners of Christ with Saints and Martyrs (about 1423-24).

https://en.wikipedia.org/wiki/All_Saints%27_Day#/media/File:All-Saints.jpg

[1] "All Saints' Day," The Columbia Encyclopedia, 6^th ed. http://www.encyclopedia.com/topic/All_Saints_Day.aspx#1

[2] John Bowker, "All Saints Day," The Concise Oxford Dictionary of World Religions. http://www.encyclopedia.com/topic/All_Saints_Day.aspx#2