The Holy Trinity Cathedral (known as Sameba) is the main cathedral of the Georgian Orthodox Church located in Tbilisi. Constructed between 1995 and 2004, it is the third-tallest Eastern Orthodox cathedral in the world and one of the largest religious buildings in the world by total area. Sameba is a synthesis of traditional styles dominating the Georgian church architecture at various stages in history and has some Byzantine undertones.
The Sameba Cathedral is erected on the Elia Hill, which rises above the left bank of the Kura River (Mtkvari) in the historic neighborhood of Avlabari in Old Tbilisi.
The cathedral consists of nine chapels (chapels of the Archangels, John the Baptist, Saint Nino, Saint George, Saint Nicholas, the Twelve Apostles, and All Saints); five of them are situated in a large, underground compartment.
The Sameba complex, the construction of which is already completed, consists of the main cathedral church, a free-standing bell-tower, the residence of the Patriarch, a monastery, a clerical seminary and theological academy, several workshops, places for rest, etc.
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.