From Wikimedia Commons, the free media repository
English: Setar (Persian: سه تار, from seh, meaning "three" and tār, meaning "string") is a Persian musical instrument. It is a member of the lute family. Two and a half centuries ago, a fourth string was added to the setar, which has 25 - 27 moveable frets which are usually made of animal intestines or silk. It originated in Persia before the spread of Islam.