Both trios were composed during Beethoven's stay at Countess Marie von Erdödy's estate, and both are dedicated to her for her hospitality.The All-Music Guide states that "because of its strangely scored and undeniably eerie-sounding slow movement, it was dubbed the 'Ghost' Trio.[2] James Keller also attributes the nickname to Czerny, adding, "You may discard as erroneous the oft-encountered claim that this movement of the Ghost Trio is a reworking of music Beethoven originally sketched as the Witches Chorus for his Macbeth.[3] These pieces are representative of Beethoven's "Middle" stylistic period, which went from roughly 1803 to 1812, and which included many of his most famous works.Beethoven wrote the two piano trios while spending the summer of 1808 back once again in Heiligenstadt, Vienna,[4] where he had completed his Symphony No.