One of the earliest forms of Christian psalmody, the alleluia psalmody, is difficult to explore since in most rites it is preserved only in part. Comparisons between direct and indirect traces of alleluia psalmody from Milan, Rome, Byzantium and Gaul as well as between alleluia psalmody and other genres of chant, especially the Mass alleluia, allow some conclusions about distinctive melodic characteristics. As one result, there seem to be common features in the Italian traditions that are missing in the Gallican tradition.