Louis XXIV
Le Roi Soleil
All nobility is artificial, but not all nobility was necessarily created. Some more or less developed organically instead.
That being said, a lot of it was created in the sense that it was developed artificially by the person with the goal of becoming a noble. Count Fulk Nerra, count of Anjou, is a clear example of this. He deliberately positioned himself as someone with trappings of authority in order to establish greater legitimacy. This trend goes back forever. Roman Senatorial and Equestrian classes are the same way. I can't speak for Plebians vs. Patricians, though, and whether that was artificial. Ancient Mesopotamian rulers would forge a line of descendants to establish legitimacy to rule and that's an analogous process.
That being said, a lot of it was created in the sense that it was developed artificially by the person with the goal of becoming a noble. Count Fulk Nerra, count of Anjou, is a clear example of this. He deliberately positioned himself as someone with trappings of authority in order to establish greater legitimacy. This trend goes back forever. Roman Senatorial and Equestrian classes are the same way. I can't speak for Plebians vs. Patricians, though, and whether that was artificial. Ancient Mesopotamian rulers would forge a line of descendants to establish legitimacy to rule and that's an analogous process.