String Quartets, Op. 33 is a set of six string quartets by Joseph Haydn, composed in 1781 and published in 1782. They exemplify Haydn's mature classical chamber style—noted for playful rhythmic surprises, increased equality and conversational interplay among the four instruments, and formal experimentation—and mark a turning point in his quartet writing that helped define the genre's mature form in the late 18th century.
