Panagia Trypiti is a historic sacred shrine of Theotokos in the town of Aigio, Greece. It is one of the most important Orthodox shrines of pilgrimage in Greece. The shrine is dedicated to the Mother of God of the Life-giving Spring. It is built on a steep cliff almost 30 meters high, near to sea.
The church was built on the site where the grace-filled Icon of Panagia was miraculously discovered in the middle of the sixteenth century by a voyager who was ship-wrecked off the shores of the Corinthian Gulf. Later in the 19th century it was expanded and took the form that it has today.
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.