He was a Catholic, nominally, and in outward observance.

With doctrines he troubled himself but little.

He had given orders to enforce conformity to the ancient Church, not with bloodshed, yet with comparative strictness, in his principality of Orange.

Beyond the compliance with rites and forms, thought indispensable in those days to a personage of such high degree, he did not occupy himself with theology.

He was a Catholic, as Egmont and Horn, Berlaymont and Mansfeld, Montigny and even Brederode, were Catholic.