― The guitar is a stringed instrument that plays an important role in the world of modern music. It on one that is hard to learn. Although instruments like the guitar was used in antiquity, it was written on the first in the 14th century. ∙ The guitar developed considerably in the 16th century in Spain and became popular in Europe in the 17th century had latte. During the 18th century the appearance of the guitar Evolved HAD to look the modern guitar. .