De iurisdictione imperii et auctoritate summi pontificis
Responsio ad quosdam errores Basiliensium
Tractatus super diuersis questionibus inter papam Eugenium IV et concilium Basiliense
Responsio inuectiua ad decretum iustissimae dampnations Basiliensium
Summa de ecclesia contra impugnatores potestatis summi pontificis
MS 157 contains fifteenth-century copies of tracts mainly relating to the schism which resulted from the Council of Basel (1431-1449). This council attempted to assert the superiority of church councils to the pope and declared Eugene IV (1383-1447, pope 1431-1447) deposed in 1440. They then elected the antipope Felix V, resulting in a schism that lasted until Felix V submitted to Eugene IV's successor, Nicholas V, in 1449.