Classical guitar was playing in concerts around the world, popularizing his modern classical guitar, as well as a new style of music in the 1920s: Spanish romantic-modern style with guitar works by Moreno Torroba, de Falla, etc. Some people consider it to have been this influence of Segovia which led to the domination of the Torres instrument. Factories all over the world began producing them in large numbers. It was the 19th century classical guitarist Francisco Tárrega who first popularized the Torres design as a classical solo instrument. Composers of the Renaissance period who wrote for four course guitar include Alonso Mudarra,
Classical guitar of modifications from a double-course guitar. The authenticity of guitars allegedly produced before the 1790s is often in question. This also corresponds to when Moretti's 6-string method appeared, in 1792. The modern classical guitar is usually played in a seated position, with the instrument resting on the left lap – and the left foot placed on a footstool. Alternatively – if a footstool is not used – a "guitar support" can be placed between the guitar and the left lap (the support usually attaches to the instrument's side with suction cups). (There are of course exceptions, with some performers choosing