The Holy Grail is one of the most iconic of the Christian relics that are still missing. But what is the Holy Grail, after all? Where does it come from, and why is it so important? It is true that many have claimed to hold it, and some have even put alternative theories forward, but the quest for it continues to this day.
In this gallery, we tell you everything we know about the Holy Grail. Curious? Click through to find out more.