Dionisio Aguado y García was a Spanish guitarist and composer, renowned for his contributions during the early 19th century. Active during the Romantic period, Aguado excelled in shaping the guitar's evolving techniques. His innovative Nuevo Método para guitarra established the framework for the contemporary six-string guitar, emphasizing nail plucking, which he championed over finger plucking. Notable works include the composition Les deux amis dedicated to his friend Fernando Sor. Aguado's prowess extended to teaching, and his instructional writings like Escuela de Guitarra, played a pivotal role in advancing guitar pedagogy. His work facilitated the transition from Baroque to modern guitar techniques leaving an indelible mark on guitar playing.