Durin is a legendary figure in J.R.R. Tolkien's Middle-earth, known as one of the Seven Fathers of the Dwarves. He is often referred to as Durin the Deathless because he is said to have lived for an exceptionally long time, founding the Dwarf kingdom of Khazad-dûm, also known as Moria. Durin is significant in Dwarven culture and history, being the first of the Longbeards and revered as a great leader. His lineage continued through several generations, with each subsequent king named Durin, reflecting his lasting legacy among the Dwarves.