Eine kleine Nachtmusik, K. 525, is a 1787 composition for a chamber ensemble by Wolfgang Amadeus Mozart. The German title means "a little serenade", though it is often rendered more literally as "a little night music". The work is written for an ensemble of 2 violins, viola, cello and double bass, but is often performed by string orchestras.
The above text from the Wikipedia article "Serenade No. 13 (Mozart)" text is available under CC BY-SA 3.0.