According to the Internet source given below, Giovanni Battista Grazioli was an Italian organist and composer.
He studied in Venice under Ferdinando Bertoni. In 1770 he was temporarily appointed organist at St. Mark's Basilica becoming the second organist in 1782 and the first in 1785 holding that position until 1789.
Grazioli composed sacred vocal works, instrumental works, such as two sets of sonatas for keyboard op. 1 and op. 3.
||Giovanni Battista Grazioli
||Biography by wikipedia.org.