The 'Minuet and Trio' is a dance movement whose origins go back to the late Baroque. It appears, often as a last movement in suites of dances by Handel and J S Bach and many other contemporaries.
In the Classical period of Mozart and Haydn it almost always appears as the 3rd movement in a symphony, chamber or solo work. Minuets are in 3 time - eg: 3/4
The structure is as follows: