The multi-centred heritage site Prehistoric pile dwellings around the Alps includes 111 individual objects in France, Switzerland, Italy, Germany, Austria and Slovenia, of which ten are located in Lombardy. Each of these objects consists of remnants of buildings erected on wooden piles in sub-alpine rivers, lakes and wetlands, built between 5000BC and 500BC. In general, only the submerged wooden parts have been preserved in the alluvial sediment, although in some places pile buildings have been reconstructed.