The guitar is probably the most widespread instrument in the world. It belongs to the family of string instruments, and its roots are not exactly known. There is a theory that the ancestor of the guitar is the tar (Persian lute), which arrived in Europe with the Arab invasion, and therefore had a strong influence in Spanish lands. On the other hand, it is also believed that the guitar may have originated from Ancient Greece, where a similar instrument with 4 strings and straight sides existed, which was later copied and modified by the Romans. However, it is known that in the 13th century in the territory of modern Spain, two types of guitars coexisted, the so-called Latin guitar and the Moorish guitar. Later, various types of vihuelas appeared. It was not until the beginning of the 16th century that the names of string instruments were confused, and only at the end of that century did they begin to be distinguished. It was then that many compositions for the guitar began to be created. At first, it was an instrument used only for accompaniment. Solo guitar pieces began to be created in the 19th century, when this instrument was improved, and by the end of the same century, it had the form of a modern guitar. Currently, there are many types of guitars. This is mainly due to the fact that this instrument has been adopted in many countries and in many types of music. You can find acoustic, electric, bass, flamenco, Hawaiian, MIDI, Brazilian (viola caipira), seven and ten-string guitars. In different epochs, various types of guitars also appeared, e.g. Renaissance and Baroque guitars with a much softer sound. Let's take a closer look at the construction of a classical guitar. It consists of a resonant body, a bridge, a neck, a fingerboard with frets. It has 6 strings E, A, d, g, b, e1, most often made of nylon or steel.