Zeno Castiglione was the nephew of Cardinal Branda Castiglione, and had succeeded his uncle (1420–1434) as Bishop of Lisieux (1424–1432). He was Bishop of Bayeux from 1432 to 1459. Conradus Eubel (1914). Hierarchia catholica medii aevi. Vol. Tomus 2 (second ed.). Münster: Libreria Regensbergiana. (in Latin), pp. 101, 176.
William Stubbs; Ernest Edward Holmes (1897). Registrum Sacrum Anglicanum (second ed.). Oxford: Clarendon. p. 89. Eubel, II, p. 176 note 1. The bishop was Collector of Papal Revenues in England.
