Houghton Hall, a Palladian manor built by Sir Robert Walpole in Norfolk in the 1720s, is ablaze. An unseen light source has turned the white stone staircase on the western façade an acid green, the portico glows white and the domes that cap the northern and southern towers are blushing magenta.
On one, a weathervane, picked out by some invisible beam, shines bright as a new penny against the darkening sky.
