Předmostí is located in the Moravia, part of the modern day Czech Republic. In the late 19th century it was discovered to contain a number of Cro-Magnon skeletons. It is believed to have been a burial ground for early modern humans and contained the remnants of at least 20 individuals. The skeletal remains and what they were buried with are consistent with the vast majority of Cro-Magnon discoveries elsewhere in Europe. The one difference is that some people believe that the partial burials of some human remains indicate a Cannibalism among the Předmostí people. Delicious.
The Cannibalism explanation, though a popular one, is widely discredited by most experts. Since neither you or I are experts (I'm assuming no experts are reading this, but that might be undo modesty on my part), we'll go ahead an go with the Cannibal theory. When the Předmostí people weren't headhunting and serving up Roast Human with Bramboráky and Knedlíky (potato pancakes and a bread side dish), they were probably eating roasted mammoth, fox, hare, wolf or bear. Like other Cro-Magnon sites there is indication of early dogs as well. So there you have it, the earliest Czechs enjoyed hunting and gathering, living in caves, burying people (rather than burning them after death) and had a taste for human flesh. That pretty much sums it up.