The strategic importance of the mountain crest across from Ehrenberg has been known for a long time. In 1632 the Swedes marched to the gates of Ehrenberg. Only years later, from 1639 to 1645, under the Tyrolean regent Archduchess Claudia Fort Claudia was built, and named after this princess. In 1703 Fort Claudia was taken by the Bavarians, who began the occupation of Ehrenberg from here. In 1782 the fortress was closed down. Even in the 19th century, the old fortress was inhabited, yet was left to decay after it was abandoned.
In 2014, the world's longest pedestrian suspension bridge was completed between the Ehrenberg Castle ruins and Fort Claudia, spanning the strategically important pass that these two structures were in part meant to guard. The length of the bridge 403 meters, with a height 110 meters.
References:The Temple of Edfu is one of the best preserved ancient shrines in Egypt. It was built in the Ptolemaic Kingdom between 237 and 57 BC.
Edfu was one of several temples built during the Ptolemaic Kingdom, including the Dendera Temple complex, Esna, the Temple of Kom Ombo, and Philae. Its size reflects the relative prosperity of the time. The present temple initially consisted of a pillared hall, two transverse halls, and a barque sanctuary surrounded by chapels. The building was started during the reign of Ptolemy III Euergetes and completed in 57 BC under Ptolemy XII Auletes. It was built on the site of an earlier, smaller temple also dedicated to Horus, although the previous structure was oriented east–west rather than north–south as in the present site.