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At least 17 finds of "Papaver somniferum" from Neolithic settlements have been reported throughout Switzerland, Germany, and Spain, including the placement of large numbers of poppy seed capsules at a burial site (the "Cueva de los Murciélagos", or "Bat Cave", in Spain), which has been carbon-14 dated to 4200 BC. Numerous finds of "P. somniferum" or "P. setigerum" from Bronze Age and Iron Age settlements have also been reported.