The terrible density of bombs that fell on London during the Blitz — the prolonged Nazi bombing campaign that lasted from September 1940 to May 1941, and killed 40,000 civilians nationwide — is well-known. The city endured, at one point, 57 consecutive nights of air strikes.

To really appreciate the scope of the attacks, though, you must explore the Bomb Sight Map, a project that plots the records of the Bomb Census Survey on a digital map of London.

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