Before revision: This practice of creating "Castrati" was common until the 18th century, and after a decline in popularity were only used in the Vatican up until the beginning of the twentieth century .
After revision: (new research suggests that the employment of castrati was tolerated by the Vatican as late as 1959)This practice of creating "Castrati" was common until the 18th century, and after a decline in popularity were only used in the Vatican up until the beginning of the twentieth century .