2024 marks the 200th anniversary of the invention of photography. Although the official birthday of photography is 1839, Mankind had been aware of the phenomenon of the photographic image for almost half a millennium by then, and had devised a device to 'capture' it - the camera obscura - but it was not until the advances in 19th century chemistry and physics that we understood how to capture this image - the photographic projection - in light-sensitive materials, and produce the first permanent photograph. Few people today are aware that the scientific discoveries in the field of photochemistry by one of Lithuania's foremost scientists and inventors, Theodore Grotus (1785-1822), made a significant contribution to this invention. This prompted not only to study in more detail and present to the public the contribution of this inventor to the global discovery of photographic technology, but also to draw attention to other Lithuanian photographic experimenters, innovators and their activities. The Museum of Photography (Vilniaus str. 140, Šiauliai) will be open until 31 December.