 In the early medieval period, Galician was a language of poetry with a strong literary tradition, but it dropped out of literary use after the 15th century.A linguistic revival began in the 19th century with poets such as Rosalía de Castro, within a cultural revival known as the "Rexurdimento", and later with Galicianist societies known as "Irmandades da Fala".The drive to political autonomy at that time was further impelled by concerns over agricultural policy, but aroused "but lukewarm interest".