[From another account of mine because I think it sums it up]

A Mural recalling an apocalyptic event, the city encountering a giant eye in the sky. The mural faded by time which, as I write this makes me think that the piece can have two interpretations: one of an apocalyptic event, a second is that the wall art prophesies an apocalypse that the civilisation yet to see; an extract from a religious story or the whole story itself.