Papa Legba is the gatekeeper of the spiritual world in voodoo religion. Also known as Vilokan.
The instrument played by Myrtle Snow (Frances Conroy) is a theremin. It was invented in 1919 by a Russian physicist named Lev Termen (US name: Leon Theremin) and it is the only instrument that is played without the need to touch it.
Stevie Nicks's songs, which are omnipresent in season 3 (Coven), are historically copy-written under the title "Welsh Witch Music".
Madison (Emma Roberts): Players only love you when they're playing.
Referencing the song Dreams, written by Stevie Nicks for the group Fleetwood Mac. The song was released in 1977.