The Maribor Water Tower is a late-Renaissance tower dating from 1555. It is of pentagonal form and consists of massive stone blocks interspersed with embrasures. It was built to secure the southeast part of the Maribor city walls from the direction of the river.
At present, the Water Tower houses a wine shop which specializes in top-quality Slovenian wines. It is Slovenia's oldest wine cellar, and is situated in what is now the center of Maribor. The shop is on the ground floor. The top floor of the tower contains a large, round hall with a high ceiling, reminiscent of a medieval banquet hall, which is dedicated entirely to wine tasting. The world's oldest grapevine is located on the side of a building a few hundred m away.
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.