Which stringed instrument was once made so large that it required two people to play it one to finger the notes and another to hold the bow?

The stringed instrument that was once made so large that it required two people to play it, with one person fingering the notes and another holding the bow, is the octobass. The octobass is an extremely large and rare instrument that belongs to the double bass family. It produces extremely low frequencies and is primarily used in orchestral settings for its unique and powerful sound.