Born in Stockholm in 1854, Cornelia Cederberg was a central figure in the Swedish spiritualist movement. She is best known for her participation in the group known as De Fem, which was established in 1896. Alongside artists such as Hilma af Klint, the group engaged in regular séances and practiced automatic drawing, seeking to communicate with higher spiritual entities through their creative output.

The work produced by Cederberg and her contemporaries within the group was characterized by its departure from traditional representational art, favoring symbolic and abstract forms derived from their spiritualist sessions. These experiments in automatic expression were conducted between 1896 and 1907, predating many mainstream developments in European abstract art.

While Cederberg remains a historical figure associated with the early development of abstraction in Sweden, recent institutional interest in the legacy of De Fem has brought renewed attention to her role within the group. Her contributions are frequently contextualized alongside the broader spiritualist practices that influenced the early 20th-century avant-garde.