Large window behind the altar
The (liturgical) east window with Pugin glass made by Hardman, is made up of five panels featuring, The Annunciation, Nativity, Assumption and Coronation, with the centre panel as the Guiding Star of Sailors. Together with the Rood screen and the High Altar these are three uniting elements.
Originally Wardell's intention was that John Hardman would design the window. Wardell suggested to Hardman four ideas, but only three were legible: the Joyful Mysteries, Rosa Mystica and Stella Matutina. In a letter of 13 April 1850, Wardell advised of an unnamed benefactor giving £150 and that Fr North himself, would give £20.
But Wardell, who designed the window frames and tracery, left Our Ladye Star of the Sea before the the east window was glazed. Pugin took over the design. “What a vile window is that Greenwich East," he wrote (15 October 1851). “There is hardly a space as large as the palm of your hand to get any design in all that is effective. …How the window has been put together puzzles me. It is a wretched job.” The invoice of 8 September 1851 was for £190 “including fixing”.
The upper panel represents the vision of God in Isaiah 6 and reinforces the sacramental mystery.
The central light of the east window shows the Madonna and Child with details that are specific to the church. For example, the Madonna stands on a crescent moon with two blue bands below it. The upper one is studded by stars, the lower one is patterned with waves.
Beneath these, four mariners send up their urgent prayers from a sailing ship which is being buffeted by a storm. The light showing the Nativity, just left of centre, is a traditional scene with Joseph by his wife's side, the ox and the ass by the manger, and a little lantern lighting the scene.
The canopies, gables and borders are all very finely detailed, as is the tracery. Two more angels hold emblems above and the wheel above depicts fluid, floating angels.