Vadstena Castle was originally built by King Gustav I in 1545 as a fortress to protect Stockholm from enemies from the south. The fortress consisted of three smaller stone buildings facing the lake, Vättern, three 31 meter wide ramparts, a courtyard, a moat and four circular cannons turrets. The original ramparts were torn down in the 19th century and the present ramparts were inaugurated in 1999. The stone buildings later formed the ground floor of the castle.
On August 22, 1552, King Gustav I married his third wife, Catherine Stenbock, in Vadstena. One of the castle banqueting halls is called The Wedding Hall, although its construction wasn't finished in time for the wedding. The reconstruction from fortress into a castle began in the 1550s, when prince Magnus became Duke of Östergötland. Duke Magnus had a mental illness and was the only son of Gustav I who didn't become king of Sweden. Magnus died in 1595 and is buried in the nearby Abbey Church.
In 1620 the castle construction was completed and all the kings of the House of Vasa up till then had led the construction. Since 1620, the castle has been very well preserved, and is one of Sweden's best examples of Renaissance architecture. Vadstena Castle was a royal palace until 1716, when the royal family lost interest in it; after which it became a storage for grain.
Since 1899, the castle has housed the Provincial Archives and today visitors can also find a Castle Museum with 16th and 17th century furniture, portraits and paintings. During summers the courtyard plays host to many concerts; both classical and pop music.
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.