From Petrarch's sonnets to Milton's epics a major characteristic of Renaissance literature is the imitation of earlier texts, and the Renaissance contains a vast and perplexing array of writings on the theory and practice of imitation. Although these writings often exhaust themselves in vindictive and ferocious ad hominem polemics—one need only recall Julius Caesar Scaliger's Orationes against Erasmus—and dwell at length on what now appears to many a sterile and fruitless debate over whether or not Cicero should be the only model for Latin prose, these treatises on imitation can offer considerable guidance for the interpretation of Renaissance literature. The theories of imitation help structure one's expectations as to the types of relations between text and model which one is likely to find, although they also amount to a strong warning against the difficulties of discovering and analyzing these relations.

While it is well known that castrati ruled the Italian operatic stage in the seventeenth and eighteenth centuries, very little scholarly work has been done on the first phase of their history. The little that can be gleaned from special studies, from general articles about musical life in the late sixteenth century, from various histories and biographies, and from two articles dealing specifically with the introduction of castrati into the papal chapel suggests that castrati entered Italy in the middle of the sixteenth century, and were needed to support (eventually supplant) boy sopranos and male falsettists employed by chapel and church choirs. The present study takes a further look at the early days of the castrato, concentrating on the court of Guglielmo Gonzaga, third Duke of Mantua (r. 1550—1587), a man who was apparently extremely interested in this type of singer.