Panorama 1453 puts you inside the morning Constantinople's walls were breached — not behind glass but under a painted sky, a few steps from the actual Theodosian ramparts at Topkapı. The centrepiece is a single circle of painting — roughly 2,350 square metres that a small team of artists filled with some ten thousand figures — and it closes into a complete dome, sky included, instead of the classic open-topped cylinder. There is no frame and no visible edge: the painted ground rolls down into real earth, with broken cartwheels and cannonballs scattered at your feet, so canvas and floor become one continuous scene.
You stand at the centre and the horizon surrounds you completely — banners, siege towers, the smoke of the great bronze cannon, the breached rampart. Recorded drums, horns and cannon fire roll around the room, and the light is pitched like an overcast dawn. Opened in 2009, it now draws families and school groups who cross from the painted breach to the real walls outside. Look up and the sky has no seam; look down and you cannot tell where the artwork ends.