Biography
Gregorio Martínez Sierra
Real name: Gregorio i María Martínez Sierra
Effective period / Period of releases: 1980
Spanish libretto writer (1881 - 1947), most of them written along with his wife, Maria Lejárraga: "Las Golondrinas" (1913, with José María Usandizaga), "El Amor Brujo" (1915, with Manuel de Falla), "El Corregidor y la Molinera" (1917, with Manuel de Falla, that later would become "El Sombrero de Tres Picos"), ...