The bridge of an ancient instrument has been discovered in Scotland, and it's dated to 2,300+ years ago. That's getting very close to the period I write.
The bridge is almost certainly from a lyre. At the very least, it gives us the separation of the strings. Ancient instruments are so rare that any little piece adds to our knowledge.
Here's a video about it, in which someone plays a reconstruction:
It's not clear to me that they've got the tuning right, though it was probably Pythagorean, and certainly the style of music is unknowable. But even so, this is fascinating stuff.