Symphonies
Mozart's symphonic production covers a 24 year interval, from 1764 to 1788. According to most recent investigations, Mozart wrote not just the 41 symphonies reported in traditional editions, but up to 68 complete works of this type. However, by convention, the original numbering has been retained, and so his last symphony is still known as "No. 41". Some of the symphonies (K. 297, 385, 550) were revised by the author after their first versions.
Read more about this topic: Mozart Violin Concertos