Although it was never fully completed, Gottfried von Strassburg's Tristan (originally published in the Middle Ages) tells the story of a love story between a knight named Tristan and the daughter of a queen named Isolde. The trouble is: Tristan is coerced to fall in love with Isolde because of a love potion created by Isolde's mother - a queen - which he accidentally ingests. Not only that, Tristan and Isolde must work against an unaccepting society - among other obstacles - to continue their relationship.
To this day, Tristan receives very positive reviews. Kirkus Reviews, for example, thought that von Strassburg's prose "sang" and was "disciplined."