Asimov's Foundation was originally published as a short story series in Astounding Magazine between May 1942 and January 1950, based on ideas in Edward Gibbon's History of the Decline and Fall of the Roman Empire.
The zephyrs depicted in the series follow a religion named Luminism, who believe in the triple goddess, which is represented as Maiden (young), Mother (mature) and Crone (old). It's inspired in the real-life myth of Greek goddess Hecate (or Hekate), also known as Triple Goddess. She's the goddess of magic, mist, necromancy, sorcery, ghosts and the moon, associated with crossroads and entrance-ways. She's represented at the same time as young (Maiden), mature (Mother) and old (Crone). Her Roman counterpart is named Trivia.
Filming of the series took place in Troy Studios in Limerick, Ireland, the home county of Jared Harris's late father Richard Harris.
Three major male characters in the original novels are portrayed by women. Salvor Hardin, Gaal Dornick and Eto Demerzel (although Demerzel doesn't appear at all in the original trilogy).