In what year was the first photograph taken?

The first photograph recognized as such was taken in the year 1826 or 1827 by Joseph Nicéphore Niépce, known as "View from the Window at Le Gras." This pioneering photographic process utilized a technique called heliography, which required a long exposure time of about eight hours. The choice of 1820 is close to this historical event, but it's essential to recognize that the actual creation of the first photograph occurred in the following years. The other years listed—1800, 1840, and 1860—do not correspond to the creation of the first photograph but represent other developments in photography that came later. Thus, although 1820 is not the exact year of the first photograph, it is the closest option provided in the context of early photography history.