Hilarion Eslava (1807-1878) was a Spanish priest musician and pedagogue. Although he was a prolific and well-known composer in his own time today he is primarily remembered for his 1846 work Metodo De Solfeo a successful Solfège Method which has been in constant use all over the world for more than 150 years. Having been a choirboy at Pamplona the method was published while Eslava was choirmaster at the Royal Chapel in Madrid and he undoubtedly used it as he was training the choristers there.