Lutherie

This is the practice of crafting stringed instruments, such as a violin or guitar. Lutherie is commonly divided into two main categories: makers of plucked or strummed string instruments or makers of stringed instruments that are bowed, which may require the additional help of an archetier. An archetier is someone skilled in the crafting of bows.

Experimental luthiers are craftsman who design string instruments with altered parts, or who create new and original instruments as are commonly used in the rock and jazz genres. Most instruments are never replicated or mass produced on a scale like the guitar or violin. However, additions to major instruments, such as the original vibrato bar become a vital part of the instrument.

Crwth

The crwth (Prounouced Crooth) is also called a crowd and is an archaic stringed musical instrument, associated particularly with Welsh music, once widely-played in Europe.

Played like a violin.  It has six strings tuned e e' a' a b' b'' and a flat bridge and fingerboard. It has begun to make a mini comeback in folk music circles.