Hilma af Klint was a Swedish artist and mystic whose paintings were amongst the first abstract art. Through her work with the group 'the Five' she created experimental automatic drawing as early as 1896, leading her towards an inventive geometric visual language capable of conceptualising invisible forces both of the inner and outer worlds. Quite apart from their diagrammatic purpose the paintings have a freshness and a modern aesthetic of tentative line and hastily captured image.
More images here.