Oskar Laske was born on the 8th of January 1874 in Czernowitz. During his youth Anton Hlavacek taught him landscape painting. After studying architecture at the Academy of Fine Arts in Vienna under Otto Wagner, he worked mainly as an independent architect and from 1904 on as a painter. His frequently drawn watercolour motives were of his travels to Europe and North Africa. Mainly landscapes, city squares, and genre scenes. His characteristic were cheerful narrative styles and intense colour use. He was a member of Hagenbund, the Secession in 1924, the Künstlerhaus Vienna from 1928 on, and he participated in their exhibitions. During the First World War he was an officer in Galicia and from 1915 on at the Isonzo front. He died in 1951 at the age of 77 years in Vienna and is buried on the Lainzer cemetery in Hietzing.