The Cathedral of the Annunciation of the Most Holy Theotokos, or, as it is also called, the Metropolis, is one of the largest Orthodox churches in Athens, located on Mitropoleos Square. Construction of the cathedral began on Christmas in 1842. The foundation stone was laid by King Otto of Greece and Queen Amalia. For the construction of the huge walls of the cathedral was used marble from 72 destroyed churches. Three architects took part in the design of the cathedral. The building was originally designed by Theophilus von Hansen. After the lower level of the building was built, construction was suspended due to lack of funds. A few years later the construction of the cathedral was continued by the architect Dimitrios Zezos. After his death, the work was continued by the French architect Francois Boulanger. After 20 years of work have been completed. On May 21, 1862, in the presence of the king and queen, the cathedral was consecrated in honor of the Annunciation of the Mother of God. The cathedral is a three-nave domed basilica 40 meters long, 20 meters wide and 24 meters high. The architecture and interior design of the cathedral is made mainly in the Greek-Byzantine style. In the cathedral are the tombs of two saints killed by the Turks. In the first one rests the Saint Philotheus. He was tortured by the Turks in 1559 for the redemption of Greek women from Turkish harems. The second is the tomb of Patriarch Gregory of Constantinople V. He was hanged by the Turks during the uprising for the independence of Greece. Until 1871, his relics rested in the Trinity Greek temple in Odessa, after which they were transported to Athens. On the square in front of the cathedral there are two statues. The first is a monument to the last Byzantine emperor Constantine XI Palaeologus (Dragash), the second to Archbishop Damaskin (during the Second World War he was the archbishop of Athens, and in 1946 the regent of King George II and the prime minister of Greece). Metropolis is the residence of the Bishop of Athens and the whole of Hellas and an important spiritual center of Greek Orthodoxy.