Middle Ages or middle age may refer to:
- Middle Ages, the European historical period from the 5th to the 16th century (400–1500)
- Middle age, a stage of life
- Middle Age: A Romance, a novel by Joyce Carol Oates
- The Middle Ages (play), the play by A. R. Gurney
Medieval or Mediaeval may refer to:
- Middle Ages, the European historical period from the 5th to the 16th century (400–1500)
- Medieval architecture a term used to represent various forms of architecture popular in the Middle Ages
- Medieval music, the music tradition of Europe from 500 to 1500 A.D.
- Medieval Times, an American dinner theater
- Medieval rock, modern post 1980s goth, metal and folk tradition that use the Middle Ages as inspiration
- Medieval: Total War, a computer strategy game
- Medieval II: Total War, a computer strategy game that is a sequel to Medieval: Total War
- Medieval (song), a 2004 song by the band Diecast's from their album Tearing Down Your Blue Skies
