Analysis of information sources in references of the Wikipedia article "Pentecost" in English language version.
Pentecost... major festival in the Christian church, celebrated on the Sunday that falls on the 50th day after Easter.
According to the Old Testament, you would go to the day of the celebration of Firstfruits, and beginning with that day, you would count off 50 days. The fiftieth day would be the Day of Pentecost. So Firstfruits is the beginning of the barley harvest and Pentecost the celebration of the beginning of the wheat harvest. Since it was always 50 days after Firstfruits, and since 49 days equals seven weeks, it always came a "week of weeks" later.
{{cite web}}: CS1 maint: archived copy as title (link)In the Middle Ages, cathedrals and great churches were built with a peculiar architectural feature called the Holy Ghost hole, a small portal in the roof through which the Holy Spirit could descend to reside among the assembled worshippers. As part of the Pentecost celebration, the hole was adorned with flowers and often a lowly servant on the cathedral roof would lower the figure of a dove through the roof into the nave of the church while the Acts account of Pentecost was read. England's Canterbury Cathedral, Mother Church of the Anglican Communion, is one church where a Holy Ghost hole can be seen today.
In the Middle Ages, cathedrals and great churches were built with a peculiar architectural feature called the Holy Ghost hole, a small portal in the roof through which the Holy Spirit could descend to reside among the assembled worshippers. As part of the Pentecost celebration, the hole was adorned with flowers and often a lowly servant on the cathedral roof would lower the figure of a dove through the roof into the nave of the church while the Acts account of Pentecost was read. England's Canterbury Cathedral, Mother Church of the Anglican Communion, is one church where a Holy Ghost hole can be seen today.
{{cite web}}: CS1 maint: archived copy as title (link)Pentecost... major festival in the Christian church, celebrated on the Sunday that falls on the 50th day after Easter.