Short answers, pulled from the story.
Giovanni Battista Martini entered the novitiate on the 11th of September 1722. He received his religious habit and professed vows that same day after completing his training.
Padre Pradieri taught Giovanni Battista Martini singing and harpsichord while Antonio Riccieri and Giacomo Antonio Perti provided lessons in counterpoint. His father Antonio Maria Martini initially taught him violin and basic music elements before these advanced studies began.
André Ernest Modeste Grétry and Josef Mysliveček studied under Giovanni Battista Martini along with Johann Christian Bach and Maksym Berezovsky. Stanislao Mattei also attended the school and later succeeded Martini as conductor of the girls choir.
Charles Burney estimated that Giovanni Battista Martini possessed 17,000 volumes within his extensive musical library collection. A portion of this archive passed to the Imperial library at Vienna following his death in 1784 while the remainder stayed in Bologna.
Giovanni Battista Martini published Storia della musica between 1757 and 1781 in three separate volumes. Each volume relates entirely to ancient music rather than covering the full scope he originally planned.
Esemplare di contrappunto appeared in Bologna during 1774 and 1775 as a learned treatise on tonalities of plain chant and counterpoints constructed upon them. The work contains examples from old Italian and Spanish schools with excellent explanatory notes attached.