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Stone walls are a kind of masonry construction that has been used for thousands of years. The first stone walls were constructed by farmers and primitive people by piling loose field stones into a dry stone wall. Later, mortar and plaster were used, especially in the construction of city walls, castles, and other fortifications before and during the Middle Ages. These stone walls are spread throughout the world in different forms. One of the best example is the Cyclopean Wall in Rajgir, India. [1]
Stone walls are usually made of local materials varying from limestone and flint to granite and sandstone. However, the quality of building stone varies greatly, both in its endurance to weathering, resistance to water penetration and in its ability to be worked into regular shapes before construction. Worked stone is usually known as ashlar, and is often used for corners in stone buildings. Granite is very resistant to weathering, while some limestones are very weak. Other limestones, such as Portland stone, are more weather-resistant.
Large structures are typically constructed with thick walls, such as those found in castles and cathedrals, which can reach up to 12 feet in thickness. These walls generally consist of a layered stone exterior and rubble infill.
A defensive wall is a fortification usually used to protect a city, town or other settlement from potential aggressors. The walls can range from simple palisades or earthworks to extensive military fortifications with towers, bastions and gates for access to the city. From ancient to modern times, they were used to enclose settlements. Generally, these are referred to as city walls or town walls, although there were also walls, such as the Great Wall of China, Walls of Benin, Hadrian's Wall, Anastasian Wall, and the Atlantic Wall, which extended far beyond the borders of a city and were used to enclose regions or mark territorial boundaries. In mountainous terrain, defensive walls such as letzis were used in combination with castles to seal valleys from potential attack. Beyond their defensive utility, many walls also had important symbolic functions – representing the status and independence of the communities they embraced.
A fortification is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from Latin fortis ("strong") and facere.
The Citadelle of Quebec, also known as La Citadelle, is an active military installation and the secondary official residence of both the Canadian monarch and the governor general of Canada. It is located atop Cap Diamant, adjoining the Plains of Abraham in Quebec City, Quebec. The citadel contains the oldest military building in Canada and forms part of the fortifications of Quebec City, which is one of only two cities in North America still surrounded by fortifications, the other being Campeche, Mexico.
Stonemasonry or stonecraft is the creation of buildings, structures, and sculpture using stone as the primary material. Stonemasonry is the craft of shaping and arranging stones, often together with mortar and even the ancient lime mortar, to wall or cover formed structures.
Dry stone, sometimes called drystack or, in Scotland, drystane, is a building method by which structures are constructed from stones without any mortar to bind them together. A certain amount of binding is obtained through the use of carefully selected interlocking stones.
Sacsayhuamán, often spelled Saqsaywaman or Xacxaguaman,, is a citadel on the northern outskirts of the city of Cusco, Peru, the historic capital of the Inca Empire. The site is at an altitude of 3,701 m (12,142 ft).
Cyclopean masonry is a type of stonework found in Mycenaean architecture, built with massive limestone boulders, roughly fitted together with minimal clearance between adjacent stones and with clay mortar or no use of mortar. The boulders typically seem unworked, but some may have been worked roughly with a hammer and the gaps between boulders filled in with smaller chunks of limestone.
The Aurelian Walls are a line of city walls built between 271 AD and 275 AD in Rome, Italy, during the reign of the Roman Emperor Aurelian. They superseded the earlier Servian Wall built during the 4th century BC.
Murus Dacicus is a construction method for defensive walls and fortifications developed in ancient Dacia sometime before the Roman conquest. It is a mix between traditional construction methods particular to Dacian builders and methods imported from Greek and Roman architecture and masonry, and – although somewhat similar construction techniques were used before, during and long after the period – it has peculiarities that make it unique.
The Ram Fortress is a 15th century fort situated on a steep slope on the right bank of the Danube, in the village of Ram, municipality of Veliko Gradište, eastern Serbia. The fortress is located on a rock, which is from the northeast side tilted towards the Danube. It is assumed that the city was built on the opposite side from Haram fortress, which was located across the Danube and left no remnants. The remains of the city are in good condition.
The existence of the earliest forts in India have been substantiated by documentation and excavation. In the medieval times, the architecture of the forts had both Hindu and Muslim influence. The forts constructed by the British initially opted for simple designs. The existing castles are continually modified and many of them are privately owned.
Chinese city walls refer to defensive walls built to protect important towns and cities in pre-modern China. In addition to walls, Chinese city defenses also included fortified towers and gates, as well as moats and ramparts around the walls.
The Hexamilion wall was a defensive wall constructed across the Isthmus of Corinth, guarding the only land route onto the Peloponnese peninsula from mainland Greece.
Defensive walls are a feature of ancient Roman architecture. The Romans generally fortified cities, rather than building stand-alone fortresses, but there are some fortified camps, such as the Saxon Shore forts like Porchester Castle in England. City walls were already significant in Etruscan architecture, and in the struggle for control of Italy under the early Republic many more were built, using different techniques. These included tightly-fitting massive irregular polygonal blocks, shaped to fit exactly in a way reminiscent of later Inca work. The Romans called a simple rampart wall an agger; at this date great height was not necessary. The Servian Wall around Rome was an ambitious project of the early 4th century BC. The wall was up to 10 metres (32.8 ft) in height in places, 3.6 metres (12 ft) wide at its base, 11 km (7 mi) long, and is believed to have had 16 main gates, though many of these are mentioned only from writings, with no other known remains. Some of it had a fossa or ditch in front, and an agger behind, and it was enough to deter Hannibal. Later the Aurelian Wall replaced it, enclosing an expanded city, and using more sophisticated designs, with small forts at intervals.
The ramparts of Quebec City is a city wall that surrounds the western end of Old Quebec's Upper Town in Quebec City, Quebec, Canada. The ramparts date back to the 17th century, with the ramparts having undergone a succession of modifications and improvements throughout their history. The city walls extend 4.6 kilometres (2.9 mi), with the southern portions of the ramparts forming a part of the Citadelle of Quebec.
The Moesian Limes is the modern term given to a collection of Roman fortifications between the Black Sea shore and Pannonia, present-day Hungary, consisting primarily of forts along the Danube to protect the Roman provinces of Upper and Lower Moesia south of the river.
Niš Fortress is a fortress in the city of Niš, Serbia. It is a complex and important cultural and historical monument. It rises on the right bank of the Nišava River, overlooking the area inhabited for longer than two millennia. It was protected by law in May 1948 as it was declared a cultural site of great significance. The current condition of the fortress lists it as one of the best preserved fortifications of this kind in Serbia as well as on the Balkan Peninsula.
The Triangula Bastion was part of the 18th-century fortifications of Riga. Its foundations are nowadays visible under a modern office building owned by Euro Live Technologies a playtech company.
In fortification architecture, a bank or rampart is a length of embankment or wall forming part of the defensive boundary of a castle, hillfort, settlement or other fortified site. It is usually broad-topped and made of excavated earth and/or masonry.
The Cyclopean Wall of Rajgir is a 40 km (25 mi) long wall of stone which encircled the ancient city of Rajgriha, in the Indian state of Bihar, to protect it from external enemies and invaders. It is among the oldest examples of cyclopean masonry in the world.