Saints are individuals of exceptional holiness and are important in many religions, including Christianity.
The first official canonization took place in 993 AD when Pope John XV (died 996 AD) declared Bishop Ulrich of Augsburg a saint.
Butler’s Lives of the Saints, published in 1759, had 1,486 entries.
The revised edition in 1956 listed 2,565 saints.
Currently, an up-to-date version of the book is in the works, so the exact number of saints is unknown.
Pope John Paul II (1920-2005) canonized twelve people, which brought the total number of saints named during his pontification to more than 300, which is about half the number of saints named in the past 400 years.
During the first 800 to 900 years of Christianity, there was no formal recognition of sainthood.
The number of martyrs and others of exceptional faith from that time are the main reason for the Feast of All Saints or All Saints Day held on November 1 and the vigil of which is called All Hollows Day or Halloween.
The origin of the festival of All Saints that is celebrated on Nov 1st can be traced back to to May 13, 609 or 610, when Pope Boniface IV consecrated the Pantheon at Rome to the Blessed Virgin and all the martyrs.
The feast of the dedicatio Sanctae Mariae ad Martyres has been celebrated in Rome ever since.