In the night before Palm Sunday, 1942 (28/29 March), Lübeck was the first German city to suffer a large-area bombardment by the Royal Air Force, the bombardment and the ensuing firestorm claiming 320 lives. The bombardment followed a tactical motivation (a lack of precision in previous bombing attacks on targets of the German war infrastructure ), but is also seen as a strike in retaliation of the previous horrible German bombings of English cities, notably Coventry. The event is today remembered in Lübeck as the Palm Sunday bombing - every Sunday before Easter, not on the calendar date on which it happened. By custom, confirmations of 14-15 yo children into the Protestant Church, a big day in a German youth, were held on Palm Sunday, so the bombardment hit a city on the eve of a day of festivities.
Some ruins of houses that collapsed on that night have been partially been left undisturbed ever since - and have thus become archeological sites. In an intact pocket of the ruined cellar of a house that collapsed during the bombing (and whose above-surface remains have long since been removed), archeologists have found the partially scorched (and therefore, dried-out) but otherwise intact remains of a nut gateau covered in intricately carved nut brittle. It was waiting in the cellar for the big day which never came.
It is going to be exhibited in the city museum.