The construction of the Greek Byzantine-style Cathedral of Saint Andrew began in 1908 under the supervision of the architect Anastasios Metaxas, followed by Georgios Nomikos. It was inaugurated 66 years later, in 1974. It is considered the largest Orthodox church in Greece and the third largest Byzantine-style church in the Balkans, after the Cathedral of Saint Sava in Belgrade and Alexander Nevsky Cathedral in Sofia. Over the central dome there is a 5-meter-long, gold-plated cross and over the other domes, there are 12 smaller crosses. These crosses symbolize Jesus and His apostles. The interior of the church is decorated with Byzantine-style wall paintings and mosaics.
Relics of the apostle Saint Andrew are stored in the church. They consist of the small finger, part of the top of the cranium of the Apostle, and small portions of the cross on which he was martyred, all kept in a special shrine. The holy skull of the Apostle was sent there from St. Peter's Basilica, Rome in September 1964, on the orders of Pope Paul VI. Cardinal Bea led the party of 15 cardinals that presented the relic to Bishop Constantine of Patras on 24 September 1964. Thousands of people (among them prime minister Georgios Papandreou) and many Greek Orthodox bishops participated in the reception ceremony of the skull. After a procession through the streets of the city, the skull was placed in a special silver miter inside the church. The cross of St. Andrew was taken from Greece during the Crusades by the Duke of Burgundy. Parts of the cross were kept since Middle Ages in the church of St. Victor in Marseilles. They were returned to Patras on 19 January 1980. The cross of the apostle was presented to the Bishop of Patras Nicodemus by the Roman Catholic delegation led by Cardinal Roger Etchegaray.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.