Adrien Tournachon, also known as Nadar, was a prominent French photographer and caricaturist born in 1820. He is best known for his pioneering work in aerial photography and portrait photography, capturing notable figures of his time, including artists and writers. Nadar's innovative techniques and use of natural light significantly influenced the field of photography. In addition to his photography, Tournachon was an accomplished balloonist, which allowed him to take some of the first aerial photographs. His contributions to both photography and ballooning have left a lasting legacy, making him a key figure in the history of visual arts in the 19th century.