Hainburg Castle, also known as Heimenburg, was built by Henry III the Holy Roman Emperor around 1050 to protect the traffic in Danube. It was enlarged in the mid-13th century. The castle was besieged in 1619-1620 by Hungarian army and conquered in 1683 by Ottomans.
After the new residence was built in 1742 the old castle was left to decay. Today Hainburg castle can freely be visited. A nice castle ruin, giving great views over the medieval town below and the surrounding countryside.
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.