From late Celtic (1st century BC) and late Roman times (4th century AD) come various finds that have, however, still yielded no conclusions as to the reasons why these peoples frequented the mountain. At its southern foot spreads an early Celtic burying ground with barrows (6th to 3rd centuries BC). Of the roughly 90 barrows, many of which were excavated in the 19th century, many are still discernible. The castle and the barrows are protected cultural monuments, any digging of or changes to which are therefore forbidden.