As at the beginning of the 17th century there had been some experimentations with different kind of lute tunings and finally the d-minor tuning has been established, the baroque period of lute music began. For a long time the instruments only had 11 courses. Relatively late nearly at the end of the 17th century 13-course lutes have been build. And in the 2nd half of the 18th century lutes with a second peghead appeared. Theese theorboed lutes had a stringing of 8 + 5 courses, for instance lutes by Martin Hoffmann and Sebastian Schalle ( both instruments are shown in the "Germanisches Nationalmuseum Nürnberg" ). Sometimes such instruments are called "Erzlaute" or german "Baroque lute" I do not share this terms and call theese instruments a "Baroque Theorboe".