Almendra was one of the most important rock groups from Buenos Aires, Argentina in the late 1960s.

Luis Alberto Spinetta, nicknamed "El Flaco", was an Argentine singer, guitarist, composer, writer and poet. One of the most influential rock musicians of Argentina, he is widely regarded as one of the founders of Argentine rock, which is considered as the first incarnation of Spanish-language rock. Born in Buenos Aires in the residential neighbourhood of Belgrano, he was the founder of iconic rock bands including Almendra, Pescado Rabioso, Invisible, Spinetta Jade, and Spinetta y Los Socios del Desierto. In Argentina January 23rd is celebrated as "Día Nacional del Músico" in honor of Spinetta's birth.