Before Segovia, people believed this could not be done. Although Segovia did all these things, the real debt that we owe to him is that of making the guitar truly a world instrument. By traveling and performing throughout the world, he brought respect and recognition to the instrument. Nylon strings were a big improvement over gut strings. They replaced gut in 1946.
Today there are many concerts of guitar music.
There are many societies and magazines devoted to the guitar. Johannes Tinctoris described the guitarra as being invented by the Catalans. This refers to the four course guitar. Each course represents one pair of double strings. Nine books of tablature were published by Adrian Le Roy.