Nobody talks about Viols, but they were very popular instruments during the Renaissance & Baroque Periods of music.
Jordi Savall is a Catalan conductor, Viol player, composer and historian of early Western music. I've enjoyed listening to his Celtic viol, as well as some of his Renaissance/Baroque period music. He formed the early music ensemble "Hesperion XXI".
Caravaggio was an Italian artist during the end of the Renaissance/beginning Baroque period that had a huge impact on Baroque style. Hesperion XXI with Jordi Savall, presents music from his time.
All of Jordi Savall's music is definitely worth checking out on YouTube.