I would have thought a suitable monument to atheism would resemble a blank monolith - as in 2001: A Space Oddyssey.
No, just the word NULL in ten-foot-high obsidian letters.
"Great Britain's two most senior military officers added to the uneasiness. [...] Lord Wolseley, Adjutant General, thought that it might be possible for an enemy to invade without waiters and pastrycooks." -Robert K. Massie, Dreadnought