The stairway to the right leading into the south tower which is now closed, is authentic, as witnessed by the wear on the stone supports for the stairs. Construction methods had obviously become fairly standard by the 1400s, with many castles showing the same design techniques for fundamental structures, such as stairs, gates, and windows. Such standardization was not a function of law or regulations, but instead was based on long-developed practices that worked, established by respected construction engineers of the period.
The stairs to the right appear to be a combination of authentic with recent repair work. The steps appear fairly new, but as the central pieces show more wear, it is probable that the stairs were simply touched up.
The walkway to the left linked several structures, providing both access and defense. Moreover, the view from above allows one to see into the structure and how it was designed. This area would include living quarters and common areas, with three stories and a roof area.
The photos at left shows that some reconstruction work has continued on the castle. However, much of the original structure since being destroyed has remained. The fact that such castles were "destroyed" and yet largely remained intact demonstrates how extensive and well-done the construction actually was.
In this photo from the valley below the north tower is on the left, which is still open.
