Ed and Lorraine Warren, the real-life paranormal investigators on whom the characters in Annabelle Comes Home are based, began their investigations in the early 1950s.
The Warrens investigated a case involving a Raggedy Ann doll named Annabelle, which they claimed was possessed by a spirit, in the early 1970s.
The Annabelle film series, including Annabelle Comes Home, was created as a spin-off of The Conjuring universe, starting with the first Annabelle movie in 2014.
Annabelle Comes Home, the third installment in the Annabelle series, was released, further exploring the lore around the possessed Annabelle doll and the Warrens.