Gregorio Martínez Sierra (1881 – 1947) was a Spanish writer, poet, dramatist, and theatre director, a key figure in the revival of the Spanish theatrical avant-garde in the early twentieth century. Wikipedia
Martínez Sierra, Gregorio (1881–1947)

Gregorio Martínez Sierra (1881 – 1947) was a Spanish writer, poet, dramatist, and theatre director, a key figure in the revival of the Spanish theatrical avant-garde in the early twentieth century. Wikipedia