Ten course lutes were very popular during the first decades of the 17th century. We know this not from the number of surviving intact instruments, which are few, but from the iconography. Still life and portrait paintings portray two distinct bowl designs. Almond shaped lute bowls built with fewer ribs from the early 16th century were re-necked into the new string disposition. This procedure was evidently so popular that when the old lutes became scarce new lutes were built copying the old design. The Italian early baroque bowls constructed with a fuller profile using many ribs provided the second design. Seventeenth century players recognized a tonal difference and chose a style according to their preference. There are numerous lute bowls surviving from both eras, some in much altered form, that are suitable for modern reconstructions of 10 course lutes. I offer an example of each style.