Tannhäuser
The story is about the struggle between sacred love and profane love, and redemption (salvation) through love.  The story is based on the historical character of Tannhäuser, about whom very little is known except the myths about him.  It is also about the myth of Venus, but it also deals with the medieval Minnesinger (minstrel). Half of the opera takes place in a historical setting, and half takes place in the mythological Venusberg.