Domenico Alaleona was an Italian organist and composer. He was first taught by Antonio Bernabei and continued his studies at the Liceo S. Cecilia in Rome: composition with Cesare De Sanctis, piano with Alessandro Bustini, harmony and organ with Remigio Renzi. In 1907 he graduated in composition, organ and harmony at Santa Cecilia in Rome, and the following year he obtained a doctorate in literature. He conducted orchestras and choirs in Livorno and Rome, where he taught choral singing at the National School of Music. In 1916 he took the chair of music history and aesthetics at the Santa Cecilia Conservatory and was a pioneer in the study of the technical aspects of music, introducing terms such as dodecaphony, which are still in use today. He was a contributor and music critic for various magazines and newspapers: "Rivista Musicale Italiana", "Harmonia", "Il pianoforte". At his death, caused by an unknown illness, he left over six hundred works, including his most famous opera Mirra, composed in 1913 and dedicated to Arturo Toscanini. The municipality of Montegiorgio named the municipal theatre and the adjacent square, where his birthplace is located, after him.