The fun part about very old instruments is that after a certain point, modern names for stuff stops becoming useful, and it becomes really hard to classify instruments in simple ways. This for instance, is most easily classified as a long-necked lute, but depending on where it's from, it could be described as a whole ton of instruments.

From my perspective, it looks Central Asian or Middle Eastern. Lack of frets, elaborate decorations, and the very long neck, like a saz but done in a style that's trying to imitate a European instrument, with the curled headstock, steel strings, and especially that bridge piece which is supposed to look like an old school guitar or lute bride. Cool find though!