Viļaka Castle was built by Archbishopric of Riga in 1342 as a wooden castle. At first it was closed monastery. It was rebuilt as a stone castle between 1509-1516. During Livonian war time in 1582 it was destroyed and finally demolished in 1702. The outer walls are 1.6m thick, remaining fragments of the walls are up to 2 meters high.
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.