This article is aimed to investigate one of the special artistic aspects of modernity, by analyzing spanish "soneto"(sonnet), especially it`s diverse formal elements. Soneto appeared as a dominant metric form when middle age`s proper characters were loosing their values. In spanish metric forms, "romance" and soneto represented correspondently the middle age and the modern period in aesthetic conscience. For our goal, we reviewed three theoretical fields: Kant`s aesthetic theory, Ong`s research about oral and literary cultures and Lotman`s semiological theory, concerning to it`s concept of the secondary signification of the artistic work. We assert that soneto consist in the formal aspects that show the specific formality of modernity: solid framed structure, complicated and strict metric constitution and it diversity of reproduction.