His writings on the late Baroque and early Classical period were highly influential, specifically, "his biographical and theoretical works were widely disseminated and served as the source for all subsequent lexicographers and historians".
[3] The son of a prosperous tax collector, Mattheson received a broad liberal education and, aside from general musical training, took lessons in keyboard instruments, violin, composition and singing.
The two were afterwards reconciled and remained in correspondence for life: shortly after his friend's death, Mattheson translated John Mainwaring's biography of Handel into German and had it published in Hamburg at his own expense ("auf Kosten des Übersetzers") in 1761.
[4] After his death in 1764, Johann Mattheson was buried in the vault of Hamburg's St. Michaelis' Church where his grave can be visited.
[7] However his books raise more and more attention and suspicion because Mattheson was a brilliant polemicist and his theories on music are often full of pedantry and pseudo-erudition.