Symphony, K. 45b (Mozart)

Symphony K. 45b, also known as the "Alte Lambacher" or "Old Lambach" Symphony, is a symphony in G major attributed to Wolfgang Amadeus Mozart. Its authenticity has been debated extensively by musicologists. It is listed in the Köchel catalogue (K. 45b), but some scholars believe it to be either by Mozart's father, Leopold Mozart, or another composer entirely. The "Alte Lambacher" designation arises from its discovery at the Lambach Abbey in Austria. The symphony typically consists of three movements: a fast first movement, a slower second movement, and a concluding fast movement, characteristic of early symphonic form. The exact date of composition is uncertain, with estimates ranging from the late 1760s to the early 1770s. The symphony's style reflects the galant style prevalent during that period.