Micrologus

Micrologus is an early medieval treatise on medieval music theory written by the monk and scholar Guido of Arezzo around the 11th century. It serves as a foundational text explaining how to read, sing, and understand Gregorian chant and other liturgical music. The work introduces concepts like neumes (early musical notation), staff notation, and the principles of pitch and melody. Essentially, Micrologus helped standardize musical practice and teaching in medieval Europe, making complex musical ideas accessible for monks and scholars, and laying the groundwork for Western music notation and education.