Léonard Misonne (1 July 1870 - 14 September 1943) was a Belgian pictorialist photographer. He is known for his landscapes and street scenes with atmospheric skies. Born to a wealthy family in Gilly, Belgium in 1870, Léonard Misonne was one of many children of Adèle Pirmez and lawyer and industrialist Louis Misonne. He studied Greek and humanities in Charleroi before going to the Université catholique de Louvain where he got a degree in mining engineering. However, he did not become a mining engineer in the long term.
Misonne is best known for his atmospheric photographs of landscapes and street scenes, with light as a key feature, and as a pioneer of pictorialism. According to the Directory of Belgian Photographers, "Misonne’s work is characterised by a masterly treatment of light and atmospheric conditions. His images express poetic qualities, but sometimes slip into an anecdotal sentimentality." He was nicknamed "the Corot of photography".Misonne devoted himself to photography from 1896, joining the Belgian Photography Association in 1897. He became a leading light in pictorialism, frequently exhibiting his photographs at exhibitions. The German occupation of Belgium during World War II greatly restricted his photography.