This audiobook explains the literary evolution of the legend of the Holy Grail. It also discusses the scholarship over the historicity of the Grail and theories about the origins of the legend.
"And He took a cup and when He had given thanks He gave it to them saying 'Drink this, all of you; for this is My blood of the covenant, which is poured out for many for the forgiveness of sins. I tell you, I shall not drink again of the fruit of the vine until I drink it new with you in My Father's kingdom.'" - Matthew 26:27
"The Grail is the womb of the beloved." - Robert Anton Wilson
The Holy Grail is one of the most famous relics of Christianity, but also one of the least understood. Today, it is mostly associated with Christ's Last Supper, possibly used during the meal as a serving cup. The gospels in the New Testament specifically mention the Holy Chalice that Jesus used to serve wine, so it's no surprise that images of the Holy Grail depict a similar kind of cup. Initially, the Holy Chalice was a separate tradition, but over time, the Holy Grail has come to be indistinguishable from the Holy Chalice itself, a concept that probably would have been foreign to the earliest Christians. While churches throughout Christendom were familiar with traditions regarding the Holy Chalice and some even claimed to have the venerated object, the legend of the Holy Grail was given life during the Middle Ages through folklore.
Today, the legends written about the Holy Grail are better known than the traditions surrounding the Holy Chalice.