Nodens in the context of "Lydney Park"

The One Ring, also called the Ruling Ring and Isildur's Bane, is a central plot element in J. R. R. Tolkien's The Lord of the Rings (1954–55). It first appeared in the earlier story The Hobbit (1937) as a magic ring that grants the wearer invisibility. Tolkien changed it into a malevolent Ring of Power and re-wrote parts of The Hobbit to fit in with the expanded narrative. The Lord of the Rings describes the hobbit Frodo Baggins's quest to destroy the Ring and save Middle-earth.

Scholars have compared the story with the ring-based plot of Richard Wagner's opera cycle Der Ring des Nibelungen; Tolkien denied any connection, but scholars state that at the least, both men certainly drew on the same mythology. Another source is Tolkien's analysis of Nodens, an obscure pagan god with a temple at Lydney Park, where he studied the Latin inscriptions, one containing a curse on the thief of a ring.

The Rings of Power are magical artefacts in J. R. R. Tolkien's legendarium, most prominently in his high fantasy novel The Lord of the Rings. The One Ring first appeared as a plot device, a magic ring in Tolkien's children's fantasy novel, The Hobbit. Tolkien later gave it a backstory and much greater power: he added nineteen other Great Rings which also conferred powers such as invisibility, and which the One Ring could control. These were the Three Rings of the Elves, the Seven Rings for the Dwarves, and the Nine for Men. He stated that there were in addition many lesser rings with minor powers. A key story element in The Lord of the Rings is the addictive power of the One Ring, made secretly by the Dark Lord Sauron; the Nine Rings enslave their bearers as the Nazgûl (Ringwraiths), Sauron's most deadly servants.

Proposed sources of inspiration for the Rings of Power range from Germanic legend with the ring Andvaranaut and eventually Richard Wagner's Der Ring des Nibelungen, to fairy tales such as Snow White, which features both a magic ring and seven dwarfs. One experience that may have been pivotal was Tolkien's professional work on a Latin inscription at the temple of Nodens; he was a god-hero linked to the Irish hero Nuada Airgetlám, whose epithet is "Silver-Hand", or in Elvish "Celebrimbor", the name of the Elven-smith who made the Rings of Power. The inscription contained a curse upon a ring, and the site was called Dwarf's Hill.

In Irish mythology, Nuada or Nuadu (modern spelling: Nuadha), known by the epithet Airgetlám (Airgeadlámh, meaning "silver hand/arm"), was the first king of the Tuatha Dé Danann. He is also called Nechtan and Nuadu Necht, and is sometimes believed to be Elcmar, husband of Boann. He is mostly known from the tale in which he loses his arm or hand in battle, and thus his kingship, but regains it after being magically healed by Dian Cécht. Nuada is thought to have been a god and is related to the British and Gaulish god Nodens, who is associated with hunting and fishing. His Welsh equivalent is Nudd or Lludd Llaw Eraint.