Sonata (From Latin an Italian sonare, "to sound"), in music, literally means a piece played as opposed to a cantata (Latin and Italian cantare, "to sing"), a piece sung. The term, being vague, naturally evolved through the history of music, designating a variety of forms prior to the Classical era. The term took on increasing importance in the Classical period, and by the early 19th century the word came to represent a principle of composing large scale works. It was applied to most instrumental genres and regarded alongside the fugue as one of two fundamental methods of organizing, interpreting and analyzing concert music. Though the sound of sonatas have changed since the Classical Era, 20th century sonatas still maintain the same structure and build.