Vesica piscis. (Eccl. Art) A glory, or aureole, of oval shape, or composed of two arcs of circles usually represented as surrounding a divine personage. More rarely, an oval composed of two arcs not representing a glory; a solid oval, etc.
... mouldings are richer and more delicate: this has just been restored, and the Purbeck marble pillars—some of which had disappeared and others had become decayed—have been replaced by pillars of Devonshire marble with Purbeck plinths and capitals; the vesica in the tympanum has been filled with stained glass representing St. Etheldreda, the foundress; the original oaken doors have been repaired, faced, and ornamented with scrollwork in iron: this has been effected at a cost of more than L1000. contributed by Mrs. Waddington, of Twyford ... — Ely Cathedral • Anonymous