"En mi Viejo San Juan" (In my Old San Juan) is a composition by Puerto Rican composer and singer Noel Estrada. Interpreted by numerous singers and translated into various languages, the song is "widely known around the world". There are musical interpretations in German, English and French. Over 1,000 distinct recordings of the song have been made worldwide. The song was written in 1942 for Estrada's brother who had been deployed to Panama during World War II and was feeling nostalgia for his Puerto Rico motherland. The song has become an anthem of Puerto Rican emigration to New York.