From www.mutopiaproject.org

The Piano Sonata No. 19 in G minor, Op. 49, No. 1, and Piano Sonata No. 20 in G major, Op. 49, No. 2, are short sonatas by Ludwig van Beethoven, published in 1805. Both works are approximately eight minutes in length, and are split into two movements. These sonatas are referred to as the Leichte Sonaten to be given to his friends and students.
The above text from the Wikipedia article "Piano Sonata No. 20 (Beethoven)" text is available under CC BY-SA 3.0.