Final answer:
Predmost, Czech Republic is renowned for its Upper Paleolithic archaeological site, which yielded human fossils, mammoth bones, tools, and ornaments related to the Gravettian culture.
Step-by-step explanation:
The question refers to what was found in Predmost, Czech Republic. Although the provided information talks about an impressive defensive perimeter around Vysehrad Castle in Prague, which is unrelated to Predmost, it is important to address the actual findings of Predmost. The site of Predmost famous for its prehistoric findings, particularly human fossils and artifacts associated with the Gravettian culture of the Upper Paleolithic period, dating back approximately 25,000 to 27,000 years ago. The discoveries include mammoth bones and ivory, tools, and personal ornaments, highlighting the prehistoric human presence and activities in the area.