According to my research, the lute guitar is an example of the evolution of musical instruments. It is a direct result of the transformation of the lute to the guitar at the end of the 18th century. It looks like a lute, except for the pegbox which is not bent back, and is strung and tuned like a guitar.
Elsewhere in this collection is a guitar which I decorated to replicate a baroque era instrument to use as part of my Rennaissance Faire costume. This instrument now replaces that one.