What is "kokle"

Kokle (; ) is a Latvian plucked string musical instrument ( chordophone) belonging to the Baltic zither family known as the Baltic psaltery. The first kokle related archeological findings in the territory of modern Latvia are from the 13th century, the first reliable written information about kokle playing comes from the beginning of the 17th century, but the first known kokle tune was notated in 1891. Both kokle and kokle playing are included in the Latvian Cultural Canon.