During what musical period did composers perfect and standardize the concerto, sonata and symphony forms?
The composers Wolfgang Amadeus Mozart and Joseph Haydn were friends. Their relationship is not very well documented, but the evidence that they enjoyed each other’s company and greatly respected each other’s work is strong, and suggests that the elder Haydn acted in at least a minor capacity as a mentor to Mozart. A group of string quartets by Mozart are dedicated to Haydn.
Haydn, still in London a year later when the news of Mozart’s death reached him, was distraught; he wrote to their mutual friend Michael Puchberg, “for some time I was quite beside myself over his death, and could not believe that Providence should so quickly have called away an irreplaceable man into the next world.” Haydn wrote to Constanze Mozart offering musical instruction to her son when he reached the appropriate age, and later followed through on his offer.