When aged ten, he was given the income from two vineyards owned by his grandmother, according to the legal document, so that he could study grammar and, especially, music: "to which he is said to have a great inclination, desiring to have himself castrated and become a eunuch".
His career in France, to which he had been invited by Louis XV, was suddenly cut short after he badly wounded a poet during a duel, and he left in disgrace after only one year.
At Naples he sang for Pergolesi, Porpora, Hasse, and Leonardo Vinci, not to mention starring in Gluck's La Clemenza di Tito.
Always a favourite of royal families and a first-rate castrato who could command vast fees, Caffarelli made a large fortune, and was able to buy himself a dukedom and impressive estates in Naples and Calabria.
On stage, he is reputed to have sung his own preferred versions irrespective of what his colleagues were doing, mimicking them while they sang their solos and sometimes conversing with members of the public in their boxes during that time.
[4] On the other hand, with Handel, also a famously fiery character, he seems to have been able to coexist on a peaceable basis, perhaps due to the fantastic sums of money the composer paid him for his work.
All the charms and love that can make up the idea of an angelic voice, and which form the character of his, added to the finest execution, and to surprising facility and precision, exercise an enchantment over the senses and the heart, which even those least sensible to music would find it hard to resist.With the nickname "Caffariello," Caffarelli is brought up in the libretto for Rossini's opera The Barber of Seville written by Cesare Sterbini.