Buchkammerfels Rock Chambers

The Buchkammerfels is accessible from the mountain. After crossing a gap, you can walk almost to the very front, from where you have a beautiful view, including to Drachenfels Castle.The entrance to the chambers that give the rock its name is eight meters up on a small ledge on the almost vertical north face of the rock. With a little practice, you can also climb up here without any safety equipment. But it is not without danger, especially the descent. If in doubt, take a look at my photos. There are four chambers and a few peepholes to see, three of which face the south side.

To this day, historians have been puzzling over the age and function of the four rock chambers, which were carved out of the rock at a height of eight meters. Although the year 1678 is carved into the rock in one of the chambers, it is assumed that they existed before 1523. In 1678, one hundred and fifty years after the destruction of the Drachenfels, the French Reunion War raged in the Palatinate and it is believed that the residents chiseled this year in memory of the rock chambers that offered protection and hiding.Such rock chambers are unique in the whole of Wasgau and do not occur in this type either on the nearby Drachenfels or on its neighboring castles. The earliest documented evidence of the existence of the book chambers dates back to 1635, when it is said that the rulers of the Drachenfels should have maintained three prisons here. Historians consider this statement to be just as doubtful as the consideration that the rock chambers should have served as an observation post for the Drachenfels, to which there is a visual connection from here. Another theory is that it was only supposed to have been a hiding place for precious goods of the Drachenfels, which could be used in the event of an imminent siege.
Be that as it may, the book chambers on Heidenberg remain a mystery, not least because there are still no archaeological finds from Heidenberg that could give any conclusions about its function and its actual age.
Source: tourenplaner-rheinland-pfalz.de/de/punkt/felsen/buchkammerfels/55147405

The climb is worth in any case!