When he was 80 Casals married one of his young students, a girl called Marta. They had met in Prades. Marta was from Puerto Rico where Casals’ mother had come from. They went to live in Puerto Rico in a house called "El Pesebre". In 1957 a musical festival was started there in the town of San Juan. He continued to visit the festival at Prades every year until 1966. He also gave masterclasses at American schools and universities as well as in other countries. Some of these were televised.