Four members of the Curiositas research project participated as speakers in the 13th International Seminar on the Background and Origins of Cinema, held in Girona, on 20th-22nd October 2021. This Seminar “Virtual Worlds in Early Cinema: Devices, Aesthetics and Audiences” was organized by the University of Girona and by the Museu del Cinema | Col·lecció Tomàs Mallol, institutional partner of Curiositas Project. Cèlia Cuenca delivered the guest lecture Mirar lo que non ven… reflexiones sobre el público de los espectáculos ópticos; Howard Gil presented the paper Del retablo mecánico al mondo nuovo: una transición técnica de exhibición y estímulo de la imaginación; and Victor Flores & Susana Martins introduced the launching of Curiositas project with the joint paper Virtual Heritage for Virtual Worlds: Researching the Iberian Cosmoramas.