Melkor also had a Ring, and the connection between his and Sauron’s gives greater understanding to the nature of evil in Tolkien’s Legendarium

Though often overshadowed by the Rings of Power and the One Ring, Aragorn’s Ring has a trove of interesting lore behind it

The Yule of pre-Christians pagans, whether the feast days in Middle-earth or Grandfather Yule in the Father Christmas Letters, does not merely precede Christmas, it presages it. For Tolkien – much like the scribe of Beowulf, as well as for his fellow Inklings – there was room enough in life and literature for the Christian and the pagan; for Christmas and Yule.

Tolkien wrote a great deal about the Seventh Age, especially the epochal event which started it

The nature of the Palantíri and their history across the ages