Alfonso Daniel Rodríguez Castelao, commonly known as Castelao, was a Galician politician, writer, painter and doctor. He is one of the fathers of Galician nationalism, promoting Galician identity and culture, and was one of the main names behind the cultural movement Xeración Nós. He was also one of the founders and president of the Galicianist Party and had a great influence on the renovating group of Galician art known as Os renovadores. Castelao is considered to be the most important figure in Galician culture of the 20th century.