Nicolaus Cosel is one of few authors in the history of Central European chant whose name is unveiled. A Franciscan friar of Silesian origin left us the manuscript WRu I Q 466, his notebook from 1414–1421.
It contains treatises, sermons, hymns, cantiones and some folios with notated music. This study is an attempt to place this small collection of liturgical music in the context of contemporary Central European cantiones.