Flood protection takes many forms, from the levees of Louisiana to the drains of East Anglia. Some villages in bronze age Europe may have had a more unusual barrier: a circle of skulls. As flooding became worse, villages in the Circum-Alpine region in what is now Germany and Switzerland started building defences. These included log palisades, houses on stilts, and flood walls reinforced with stone and skulls. There is no documentary evidence for the flood protection theory, which remains speculative.
