An oratorio is a large-scale piece of music for choir, orchestra and vocal soloists, which tells a story without staging or costumes. Most oratorios are based on stories from the Bible, a source that Handel's English audiences knew well.
Enthir is a Bosmer sorcerer and merchant found at the College of Winterhold, and has connections to the Thieves Guild in Skyrim.
The Elder Scrolls V: Skyrim -- Dragonborn. The Ritual Stone. is East of Whiterun and West of Valtheim Tower, just head East on the road out of Whiterun heading towards Windhelm and you should see it along the way. EditEffect.