London has been described as a city built on the spoils of empire, prompting visitors, at least over a damp weekend in March, to wonder why more of these spoils weren’t spent on proper indoor heating.

This 1941 Japanese map attacking the history of British Imperial expansion is taken directly from an almost identical 1918 German poster, “Freiheit der Meere” (ID #2286). Show more In January 1918, ...