The Metropolitan Cathedral of the Annunciation construction began on Christmas Day, 1842 with the laying of the cornerstone by King Otto and Queen Amalia.
Workers used marble from 72 demolished churches to build the Cathedral's immense walls. Three architects and 20 years later, it was complete. On May 21, 1862, the completed Cathedral was dedicated to the Annunciation of the Mother of God by the King and Queen. The Cathedral is a three-aisled, domed basilica. Inside are the tombs of two saints killed by the Ottoman Turks during the Ottoman period: Saint Philothei and Patriarch Gregory V.
Saint Philothei built a convent, was martyred in 1589, and her bones are still visible in a silver reliquary. She is honored for ransoming Greek women enslaved in Ottoman Empire's harems.Gregory V the Ethnomartyr, Patriarch of Constantinople, was hanged by order of Sultan Mahmud II and his body thrown into the Bosphorus in 1821, in retaliation for the Greek uprising on March 25, leading to the Greek War of Independence. His body was rescued by Greek sailors and eventually enshrined in Athens.
In the Square in front of the Cathedral stand two statues. The first is that of Saint Constantine XI the Ethnomartyr, the last Byzantine Emperor. The second is a statue of Archbishop Damaskinos who was Archbishop of Athens during World War II and was Regent for King George II and Prime Minister of Greece in 1946.
The Metropolitan Cathedral remains a major landmark in Athens and the site of important ceremonies with national political figures present, as well as weddings and funerals of notable personalities.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.