The Grosse Horloge of La Rochelle is a former city gate dating back to the original fortifications known as Guillaume X. It received a bell and clock in 1478, becoming the city's belfry, replacing the Mallevault gate.
Originally a gate in La Rochelle's fortified city, part of the early medieval fortifications, the Grosse-Horloge was built in the early 12th century during the construction of the first medieval enclosure. The gate featured two openings: a wider one for carts and a smaller one for pedestrians.
In 1478, an octagonal bell tower was added, topped with a campanile housing the clock bell. This upper part closely resembled the Cailhau gate (except for the central window). In 1672, the two openings were merged into a single arch to facilitate traffic.
In 1746, the upper part of the structure was demolished to make way for the current Louis XV-style cartouche flanked by scientific and military attributes.
Today, it remains one of the main passage points between the quays and the old town. For a few years, it also housed an archaeological museum related to the Templars of La Rochelle.
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.