1) Castrati made themselves eunuchs both for art's sake and for jobs in baroque Rome.

2) Castrato: A male soprano especially cut out for his job.

3) Moreschi (the last Castrato) is especially interesting to me due to my interests in history, religion, and music; Moreschi combines all three!

4) Castrato, the special singer which created in medieval Europe, is the combination of religion and human physiology of that age.

5) Bel canto originated from Castrato under the background of religious music and has retained the vocal techniques used by Castrati.