Walden, originally titled Diaries, Notes and Sketches (also known as Walden), is a 1968 American film by experimental filmmaker Jonas Mekas. After several years of filming everyday scenes from his life, Mekas was commissioned by the Albright–Knox Art Gallery to make Walden. It was his first major diary film, and he named it after Henry David Thoreau's 1854 memoir Walden. Mekas's film has received acclaim as a work of avant-garde cinema.