This article analyses six Northitalian Dominican liturgical codices with musical notation held by the Archbishop Library of the Kroměříž Castle which were bought in Vienna by Theodor Kohn, the archbishop of Olomouc, in 1895. Three of them are antiphonaries, three psalteries which bring evidence of the musical state of liturgy in the Lombardian Dominican Province from the 14th century´s first decennies until the 18th century. Four of them (nrs. 1–4) are valuable documents of the Northitalian illumination of the 14th – 17th centuries of Bononian and Ferrara´s circuits.