 This work, entitled, "Four Dialogues on Scenic Representation" ("Quattro dialoghi in materia di rappresentazioni sceniche"), takes the form of four conversations, between Veridico, a tailor/playwright/director, who acts as the voice of the author, and two curious gentlemen, Santino and Massimiano, who ask Veridico various questions about the theory and practice of the theater.This work marks a major milestone in the modernization of the theater from the unsophisticated days of the Middle Ages, and it also supplies valuable information on how theatrical spectacles were conceived and performed at this point during the Italian Renaissance.De' Sommi wrote most of his plays in poetry in the service of the Gonzaga dukes, and eventually became a member of the prestigious Accademia degli Invaghiti, from which Jews were technically barred.