Ask History: Is There Really a Holy Grail? (3) tv-pg Play video Select your TV provider to log in to have full access to videos Select your TV provider See all providers Don't see your TV provider? Learn more You can access this video on the free HISTORY® apps. *You must verify your TV provider towatch this video on the App Your Parental Control settings do not allow you to view this content. Ask History: Is There Really a Holy Grail? (3 min) tv-pg The Holy Grail is considered the most sacred Christian relic, but does it actually exist? Ask History finds out.