Short answers, pulled from the story.
Marcus Fabius Quintilianus arrived in the world around 35 AD within the town of Calagurris, now known as Calahorra in La Rioja. His father sent him to Rome early during Nero's reign.
Around 95 AD Quintilian composed a twelve-volume textbook titled Institutio Oratoria. This work covered theory and practice alongside foundational education from cradle to grave.
Quintilian's influence fluctuated after his death around 100 AD until Poggio Bracciolini rediscovered a complete manuscript in 1416. The Italian humanist found the document buried in rubbish and dust within a filthy dungeon at the Abbey of Saint Gall.
In Book II Quintilian sided with Plato's assertion that the rhetorician must be just. He stated clearly that the perfect orator is first a good man before becoming a good speaker.
Johann Sebastian Bach composed Das musikalische Opfer with close connection to the Institutio Oratoria during his tenure at Leipzig from 1723 to 1750. Modern scholars believe Quintilian is the earliest spokesman for child-centered education theories discussed in his early childhood chapters.