This volume contains short two-part extracts from choral church music of the 15th century (masses and motets), arranged in ascending order of difficulty. The principal aim of this compilation was pedagogical: to provide students with fairly easy etudes of the period, through which they can later gain access to the large-scale, four-part compositions of Renaissance vocal polyphony, which at first sight generally seem very difficult and complex. At the same time, many of these pieces of varying length, each of which forms a complete unit in itself, are very suitable for public performance, and for use in a liturgical framework.