Flintstone dagger, 2900 BC. Found in <a href="https://en.wikipedia.org/wiki/Allensbach" class="extiw" title="en:Allensbach">Allensbach</a>, Germany in 2003, amongst the remains of a pile dwelling near <a href="https://en.wikipedia.org/wiki/Lake_Constance" class="extiw" title="en:Lake Constance">Lake Constance</a>. Current location: Archäologisches Landesmuseum Konstanz, Germany
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<span class="int-own-work" lang="en">Own work</span>