Meanings of white mitre in English

Here are the pastoral staff, the white mitre, and the mantle with which you invested me.

He is represented at his cathedral door, distributing alms, robed in black, with a white mitre.

On his head is his tall white mitre.

In the altar-piece at the National Gallery those white mitres form the key-note from which the pale, cloistral splendours of the whole picture radiate.