The Carte-de-Visite

In 1854, a photographer by the name of André Disdéri patented a new take on the collodion process called the Carte-de-Visite (or Carte, for short). Though they could be a singular image, Cartes were often multiple exposures taken onto a single sheet of paper, creating almost a collage effect. A multi-lens camera had tubular lenses…

source https://photofocus.com/2017/06/11/the-carte-de-visite/