Twin towers are a concept in architecture where 2 similar looking towers are built in close proximity to each other. They have been an architectural motif in human civilization for millennia.
Early examples include the use of twin gate towers in urban and palatial architecture in Chinese cities from the Warring States period, when they were viewed as "signifiers of the celestial realm". [1] In the medieval period, examples include the Seljuk Kharraqan towers, twin towers wrought in decorative brickwork that represent a prominent work in the art and architecture of Islamic Iran. [2]
In the contemporary era, the Petronas Twin Towers in Kuala Lumpur, Malaysia are a particularly celebrated example of twin tower architecture that, from 1998 to 2003, were the tallest structure in the world. [3] The twin towers that were part of the original World Trade Center in New York City, New York until 2001 are also very iconic, although infamous due to the September 11 attacks. Twin towers also recur in Chinese construction, where, while the structures still representing a relative rarity, architects and engineers have developed novel interlinking twinned structures such as the CCTV Headquarters. [4]
In contemporary architecture, structurally connected twin towers with unequal heights have found particular favor among architects for their earthquake-resistant properties, due to such couplings yielding two differing vibration frequencies, enabling the twinned towers to support their counterparts at their more vulnerable frequencies. [5]
A bridge is a structure built to span a physical obstacle without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, the material used to make it, and the funds available to build it.
A skyscraper is a tall continuously habitable building having multiple floors. Modern sources define skyscrapers as being at least 100 meters (330 ft) or 150 meters (490 ft) in height, though there is no universally accepted definition, other than being very tall high-rise buildings. Historically, the term first referred to buildings with between 10 and 20 stories when these types of buildings began to be constructed in the 1880s. Skyscrapers may host offices, hotels, residential spaces, and retail spaces.
The Petronas Towers, also known as the Petronas Twin Towers and colloquially the KLCC Twin Towers, are an interlinked pair of 88-storey supertall skyscrapers in Kuala Lumpur, Malaysia, standing at 451.9 metres. From 1998 to 2004, they were officially designated as the tallest buildings in the world until they were surpassed by the completion of the Taipei 101. The Petronas Towers are the world's tallest twin skyscrapers and remained the tallest buildings in Malaysia until 2019, when they were surpassed by The Exchange 106. The Petronas Towers are a major landmark of Kuala Lumpur, along with the nearby Kuala Lumpur Tower and Merdeka 118, and are visible in many places across the city.
A tower is a tall structure, taller than it is wide, often by a significant factor. Towers are distinguished from masts by their lack of guy-wires and are therefore, along with tall buildings, self-supporting structures.
A minaret is a type of tower typically built into or adjacent to mosques. Minarets are generally used to project the Muslim call to prayer (adhan) from a muezzin, but they also served as landmarks and symbols of Islam's presence. They can have a variety of forms, from thick, squat towers to soaring, pencil-thin spires.
Islamic architecture comprises the architectural styles of buildings associated with Islam. It encompasses both secular and religious styles from the early history of Islam to the present day. The Islamic world encompasses a wide geographic area historically ranging from western Africa and Europe to eastern Asia. Certain commonalities are shared by Islamic architectural styles across all these regions, but over time different regions developed their own styles according to local materials and techniques, local dynasties and patrons, different regional centers of artistic production, and sometimes different religious affiliations.
A tuned mass damper (TMD), also known as a harmonic absorber or seismic damper, is a device mounted in structures to reduce mechanical vibrations, consisting of a mass mounted on one or more damped springs. Its oscillation frequency is tuned to be similar to the resonant frequency of the object it is mounted to, and reduces the object's maximum amplitude while weighing much less than it.
The Kharraqan towers are a pair of mausolea built in 1067 and 1093, in the Kharraqan region of northern Iran, near Qazvin. They are notable for being an early example of geometric ornament, an early example of double domes, and one of the earlier tomb towers that appeared in the Seljuk period of medieval Iran during the 11th century.
Iranian architecture or Persian architecture is the architecture of Iran and parts of the rest of West Asia, the Caucasus and Central Asia. Its history dates back to at least 5,000 BC with characteristic examples distributed over a vast area from Turkey and Iraq to Uzbekistan and Tajikistan, and from the Caucasus to Zanzibar. Persian buildings vary greatly in scale and function, from vernacular architecture to monumental complexes. In addition to historic gates, palaces, and mosques, the rapid growth of cities such as the capital Tehran has brought about a wave of demolition and new construction.
Mudéjar art, or Mudéjar style, was a type of ornamentation and decoration used in the Iberian Christian kingdoms, primarily between the 13th and 16th centuries. It was applied to Romanesque, Gothic and Renaissance architectural styles as constructive, ornamental and decorative motifs derived from those that had been brought to or developed in Al-Andalus. These motifs and techniques were also present in the art and crafts, especially Hispano-Moresque lustreware that was once widely exported across Europe from southern and eastern Spain at the time.
Turkish art refers to all works of visual art originating from the geographical area of what is present day Turkey since the arrival of the Turks in the Middle Ages. Turkey also was the home of much significant art produced by earlier cultures, including the Hittites, Ancient Greeks, and Byzantines. Ottoman art is therefore the dominant element of Turkish art before the 20th century, although the Seljuks and other earlier Turks also contributed. The 16th and 17th centuries are generally recognized as the finest period for art in the Ottoman Empire, much of it associated with the huge Imperial court. In particular the long reign of Suleiman the Magnificent from 1520 to 1566 brought a combination, rare in any ruling dynasty, of political and military success with strong encouragement of the arts.
Architecture of Central Asia refers to the architectural styles of the numerous societies that have occupied Central Asia throughout history. These styles include a regional tradition of Islamic and Iranian architecture, including Timurid architecture of the 14th and 15th centuries, as well as 20th-century Soviet Modernism. Central Asia is an area that encompasses land from the Xinjiang Province of China in the East to the Caspian Sea in the West. The region is made up of the countries of Kazakhstan, Uzbekistan, Tajikistan, Kyrgyzstan, and Turkmenistan. The influence of Timurid architecture can be recognised in numerous sites in Kazakhstan and Uzbekistan, whilst the influence of Persian architecture is seen frequently in Uzbekistan and in some examples in Turkmenistan. Examples of Soviet architecture can be found in Uzbekistan, Kazakhstan, Tajikistan and Kyrgyzstan.
The architecture of the Song dynasty (960–1279) was noted for its towering Buddhist pagodas, enormous stone and wooden bridges, lavish tombs, and extravagant palaces. Although literary works on architecture existed beforehand, architectural writing blossomed during the Song dynasty, maturing into a more professional form that described dimensions and working materials in a concise, organized manner. In addition to the examples still standing, depictions in Song artwork, architectural drawings, and illustrations in published books all aid modern historians in understanding the architecture of the period.
Architecture is the art and technique of designing and building, as distinguished from the skills associated with construction. It is both the process and the product of sketching, conceiving, planning, designing, and constructing buildings or other structures. The term comes from Latin architectura; from Ancient Greek ἀρχιτέκτων (arkhitéktōn) 'architect'; from ἀρχι- (arkhi-) 'chief', and τέκτων (téktōn) 'creator'. Architectural works, in the material form of buildings, are often perceived as cultural symbols and as works of art. Historical civilisations are often identified with their surviving architectural achievements.
Muqarnas, also known in Iberian architecture as Mocárabe, is a form of ornamented vaulting in Islamic architecture. It is the archetypal form of Islamic architecture, integral to the vernacular of Islamic buildings. It was most likely first developed in eleventh-century Iraq, though the earliest preserved examples are also found outside this region.
Seljuk architecture comprises the building traditions that developed under the Seljuk dynasty, when it ruled most of the Middle East and Anatolia during the 11th to 13th centuries. The Great Seljuk Empire contributed significantly to the architecture of Iran and surrounding regions, introducing innovations such as the symmetrical four-iwan layout and the first widespread creation of state-sponsored madrasas. Their buildings were generally constructed in brick, with decoration created using brickwork, tiles, and carved stucco.
The Tomb of Ahmad Sanjar is a mausoleum commemorating Ahmad Sanjar, a Seljuk ruler of Khorasan. It was built in 1157 in the medieval city of Merv in the Karakum Desert in Turkmenistan. Throughout his reign, Sanjar fought off several invasions and uprisings until finally being defeated by the Oghuz. After being sacked by the Oghuz, Merv declined and in 1221, the Mongols attacked it and burned down the mausoleum. It would later be restored by Soviet, Turkmen, and Turkish architects during the 20th and 21st centuries. The tomb is part of The State Historical and Cultural Park "Ancient Merv", a UNESCO World Heritage Site.
Persian domes or Iranian domes have an ancient origin and a history extending to the modern era. The use of domes in ancient Mesopotamia was carried forward through a succession of empires in the Greater Iran region.
Architecture of Cuba refers to the buildings, structures and architectural history throughout the Caribbean island nation of Cuba. The unique mix of cultural and artistic influences throughout history have led to Cuba being renowned for its eclectic and diverse architecture, which can be defined as a unique fusion of numerous well-studied architectural styles from around the world.
The architecture of Afghanistan refers to a distinct style of architecture of the modern country and its predecessor states. As the connection between the three major cultural and geographic centers of Central Asia, the Indian subcontinent, and the Iranian plateau, the boundaries of the region prior to this time changed with the rapid advancement of armies, with the land belonging to a vast range of empires over the last two millennia.