Porcelain Tower of Nanjing

History
The original blocks of the Nanjing Tower's arched door, now pieced back together and on display at the Nanjing MuseumThe Porcelain Tower of Nanjing was designed during reign of the Yongle Emperor (r. 1402-1424) shortly before its construction, in the early 15th century. It was first discovered by the Western world when European travelers like Johan Nieuhof visited it,sometimes listing it as one of the Seven Wonders of the World. After this exposure to the outside world, the tower was seen as a national treasure to both locals and other cultures around the world.In 1801, the tower was struck by lightning and the top three stories were knocked off, but it was soon restored. The 1843 book The Closing Events of the Campaign in China by Granville Gower Loch contains a detailed description of the tower as it existed in the early 1840s. In the 1850s, the area surrounding the tower erupted in civil war as the Taiping Rebellion reached Nanjing and the Taiping Rebels took over the city. They smashed the Buddhist images and destroyed the inner staircase to deny the Qing enemy an observation platform. American sailors reached the city in May 1854 and visited the hollowed tower. In 1856, the Taiping destroyed the tower either in order to prevent a hostile faction from using it to observe and shell the city or from superstitious fear of its geomantic properties.After this, the tower's remnants were salvaged for use in other buildings, while the site lay dormant until a recent surge to try to rebuild the landmark.

Description
The original blocks of the Nanjing Tower's arched door, now pieced back together and on display at the Nanjing MuseumThe tower was octagonal with a base of about 97 feet (30 m) in diameter. When it was built, the tower was one of the largest buildings in China, rising up to a height of 260 feet (79 m) with nine stories and a staircase in the middle of the pagoda, which spiraled upwards for 184 steps. The top of the roof was marked by a golden pineapple. There were original plans to add more stories, according to an American missionary who in 1852 visited Nanjing. There are only a few Chinese pagodas that surpass its height, such as the still existent 275-foot-tall (84 m) 11th-century Liaodi Pagoda in Hebei or the no longer existent 330-foot-tall (100 m) 7th-century wooden pagoda of Chang'an.The tower was built with white porcelain bricks that were said to reflect the sun's rays during the day, and at night as many as 140 lamps were hung from the building to illuminate the tower. Glazes and stoneware were worked into the porcelain and created a mixture of green, yellow, brown and white designs on the sides of the tower, including animals, flowers and landscapes. The tower was also decorated with numerous Buddhist images.

Great Wall of China

The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China in part to protect the Chinese Empire or its prototypical states against intrusions by various nomadic groups or military incursions by various warlike peoples or forces. Several walls had already been begun to be built beginning around the 7th century BC  these, later joined together and made bigger, stronger, and unified are now collectively referred to as the Great Wall. Especially famous is the wall built between 220–206 BC by the first Emperor of China, Qin Shi Huang. Little of that wall remains. Since then, the Great Wall has on and off been rebuilt, maintained, enhanced; the majority of the existing wall was reconstructed during the Ming Dynasty.Other purposes of the Great Wall have included border controls, allowing the imposition of duties on goods transported along the Silk Road, regulation or encouragement of trade and the control of immigration and emigration. Furthermore, the defensive characteristics of the Great Wall were enhanced by the construction of watch towers, troop barracks, garrison stations, signaling capabilities through the means smoke or fire, and the fact that the path of the Great Wall also served as a transportation corridor.
The Great Wall stretches from Shanhaiguan in the east, to Lop Lake in the west, along an arc that roughly delineates the southern edge of Inner Mongolia. The most comprehensive archaeological survey, using advanced technologies, has concluded that all the walls measure 8,851.8 km (5,500.3 mi). This is made up of 6,259.6 km (3,889.5 mi) sections of actual wall, 359.7 km (223.5 mi) of trenches and 2,232.5 km (1,387.2 mi) of natural defensive barriers such as hills and rivers.

Early walls
The Chinese were already familiar with the techniques of wall-building by the time of the Spring and Autumn Period.During this time and the subsequent Warring States Period, the states of Qin, Wei, Zhao, Qi, Yan and Zhongshan all constructed extensive fortifications to defend their own borders. Built to withstand the attack of small arms such as swords and spears, these walls were made mostly by stamping earth and gravel between board frames.Qin Shi Huang conquered all opposing states and unified China in 221 BCE, establishing the Qin Dynasty. Intending to impose centralized rule and prevent the resurgence of feudal lords, he ordered the destruction of the wall sections that divided his empire along the former state borders. To protect the empire against intrusions by the Xiongnu people from the north, he ordered the building of a new wall to connect the remaining fortifications along the empire's new northern frontier. Transporting the large quantity of materials required for construction was difficult, so builders always tried to use local resources. Stones from the mountains were used over mountain ranges, while rammed earth was used for construction in the plains. There are no surviving historical records indicating the exact length and course of the Qin Dynasty walls. Most of the ancient walls have eroded away over the centuries, and very few sections remain today. The human cost of the construction is unknown, but it has been estimated by some authors that hundreds of thousands, if not up to a million, workers died building the Qin wall. Later, the Han, Sui, and Northern dynasties all repaired, rebuilt, or expanded sections of the Great Wall at great cost to defend themselves against northern invaders. The Tang and Song Dynasties did not build any walls in the region.The Liao, Jin, and Yuan dynasties, who ruled Northern China throughout most of the 10-13th centuries, had their original power bases north of the Great Wall proper; accordingly, they would have no need throughout most of their history to build a wall along this line. The Liao carried out limited repair of the Great Wall in a few areas, however the Jin did construct defensive walls in the 12th century, but those were located much to the north of the Great Wall as we know it, within today's Inner and Outer Mongolia.

Ming era
The Great Wall concept was revived again during the Ming Dynasty in the 14th century, and following the Ming army's defeat by the Oirats in the Battle of Tumu. The Ming had failed to gain a clear upper hand over the Manchurian and Mongolian tribes after successive battles, and the long-drawn conflict was taking a toll on the empire. The Ming adopted a new strategy to keep the nomadic tribes out by constructing walls along the northern border of China. Acknowledging the Mongol control established in the Ordos Desert, the wall followed the desert's southern edge instead of incorporating the bend of the Huang He.
Unlike the earlier Qin fortifications, the Ming construction was stronger and more elaborate due to the use of bricks and stone instead of rammed earth. As Mongol raids continued periodically over the years, the Ming devoted considerable resources to repair and reinforce the walls. Sections near the Ming capital of Beijing were especially strong.
During the 1440s–1460s, the Ming also built a so-called "Liaodong Wall". Similar in function to the Great Wall (whose extension, in a sense, it was), but more basic in construction, the Liaodong Wall enclosed the agricultural heartland of the Liaodong province, protecting it against potential incursions by Jurched-Mongol Oriyanghan from the northwest and the Jianzhou Jurchens from the north. While stones and tiles were used in some parts of the Liaodong Wall, most of it was in fact simply an earth dike with moats on both sides.
Towards the end of the Ming Dynasty, the Great Wall helped defend the empire against the Manchu invasions that began around 1600. Even after the loss of all of Liaodong, the Ming army under the command of Yuan Chonghuan held off the Manchus at the heavily fortified Shanhaiguan pass, preventing the Manchus from entering the Chinese heartland. The Manchus were finally able to cross the Great Wall in 1644, after Beijing had fallen to Li Zicheng's rebels, and the gates at Shanhaiguan were opened by the commanding Ming general Wu Sangui, who hoped to use the Manchus to expel the rebels from Beijing. The Manchus quickly seized Beijing, and defeated both the rebel-founded Shun Dynasty and the remaining Ming resistance, establishing the Qing Dynasty rule over all of China.
In 2009, an additional 290 km (180 mi) of previously undetected portions of the wall, built during the Ming Dynasty, were discovered. The newly discovered sections range from the Hushan mountains in the northern Liaoning province, to Jiayuguan in western Gansu province. The sections had been submerged over time by sandstorms which moved across the arid region.
Under Qing rule, China's borders extended beyond the walls and Mongolia was annexed into the empire, so construction and repairs on the Great Wall were discontinued. On the other hand, the so-called Willow Palisade, following a line similar to that of the Ming Liaodong Wall, was constructed by the Qing rulers in Manchuria. Its purpose, however, was not defense but rather migration control.

Hanging Gardens of Babylon

The Hanging Gardens of Babylon were considered to be one of the Seven Wonders of the Ancient World, and the only one of the Wonders that may have been purely legendary. They were purportedly built in the ancient city state of Babylon, near present day Al Hillah, Babil province, in Iraq. The Hanging Gardens were not the only World Wonder in Babylon; the city walls and obelisk attributed to Queen Semiramis were also featured in ancient lists of Wonders.The gardens were attributed to the Neo-Babylonian king Nebuchadnezzar II, who ruled between 605 and 562 BC. He is reported to have constructed the gardens to please his homesick wife, Amytis of Media, who longed for the plants of her homeland. The gardens were said to have been destroyed by several earthquakes after the 2nd century BC.The Hanging Gardens of Babylon are documented by ancient Greek and Roman writers, including Strabo, Diodorus Siculus, and Quintus Curtius Rufus. However, no cuneiform texts describing the Hanging Gardens are extant, and no definitive archaeological evidence concerning their whereabouts have been found.Ancient writers describe the possible use of something similar to an Archimedes screw as a process of irrigating the terraced gardens. Estimates based on descriptions of the gardens in ancient sources say the Hanging Gardens would have required a minimum amount of 8,200 gallons (37,278 liter) of water per day. Nebuchadnezzar II is also reported to have used massive slabs of stone, a technique not otherwise attested in Babylon, to prevent the water from eroding the ground.

Current scholarship and controversy

This copy of a bas relief from the North Palace of Ashurbanipal (669–631 BC) at Nineveh shows a luxurious garden watered by an aqueduct.There is some controversy as to whether the Hanging Gardens were an actual construction or a poetic creation, owing to the lack of documentation in contemporaneous Babylonian sources. There is also no mention of Nebuchadnezzar’s wife Amyitis (or any other wives), although a political marriage to a Median or Persian would not have been unusual.Herodotus, writing about Babylon closest in time to Nebuchadnezzar II, does not mention the Hanging Gardens in his Histories. However, it is possible that cuneiform texts on the Hanging Gardens may yet be found.To date, no archaeological evidence has been found at Babylon for the Hanging Gardens. It is possible that this evidence exists beneath the Euphrates, which cannot be excavated safely at present. The river flowed east of its current position during the time of Nebuchadnezzar II, and consequently little is known about the western portion of Babylon.A more recent theory proposes that the Hanging Gardens of Babylon were actually constructed by the Assyrian king Sennacherib (reigned 705 – 681 BC) for his palace at Nineveh. Stephanie Dalley posits that during the intervening centuries the two sites became confused, and the extensive gardens at Sennacherib's palace were attributed to Nebuchadnezzar II's Babylon.

Temple of Artemis

The Temple of Artemis , also known less precisely as the Temple of Diana, was a Greek temple dedicated to a goddess Greeks identified as Artemis and was one of the Seven Wonders of the Ancient World. It was located in Ephesus (near the modern town of Selçuk in present-day Turkey), and was completely rebuilt three times before its eventual destruction in 401. Only foundations and sculptural fragments of the latest of the temples at the site remain.The first sanctuary (temenos) antedated the Ionic immigration by many years, and dates to the Bronze Age. Callimachus, in his Hymn to Artemis, attributed it to the Amazons. In the 7th century the old temple was destroyed by a flood. Its reconstruction began around 550 BC, under the Cretan architect Chersiphron and his son Metagenes, at the expense of Croesus of Lydia: the project took 10 years to complete, only to be destroyed in an act of arson by Herostratus. It was later rebuilt.Antipater of Sidon, who compiled the list of the Seven Wonders, describes the finished temple:I have set eyes on the wall of lofty Babylon on which is a road for chariots, and the statue of Zeus by the Alpheus, and the hanging gardens, and the colossus of the Sun, and the huge labour of the high pyramids, and the vast tomb of Mausolus; but when I saw the house of Artemis that mounted to the clouds, those other marvels lost their brilliancy, and I said, "Lo, apart from Olympus, the Sun never looked on aught so grand".

Earliest phase
The sacred site (temenos) at Ephesus was far older than the Artemision itself. Pausanias was certain that it antedated the Ionic immigration by many years, being older even than the oracular shrine of Apollo at Didyma. He said that the pre-Ionic inhabitants of the city were Leleges and Lydians. Callimachus, in his Hymn to Artemis, attributed the earliest temenos at Ephesus to the Amazons, whose worship he imagines already centered upon an image (bretas) of Artemis, their matron goddess.
Modern archaeology cannot confirm Pausanias' Amazons, but his account of the site's antiquity seems well-founded. Before World War I, site excavations by David George Hogarth identified three successive temple buildings. Re-excavations in 1987-88 confirmed that the site was occupied as early as the Bronze Age, with a sequence of pottery finds that extend forward to Middle Geometric times, when the clay-floored peripteral temple was constructed, in the second half of the 8th century BC.The peripteral temple at Ephesus offers the earliest example of a peripteral type on the coast of Asia Minor, and perhaps the earliest Greek temple surrounded by colonnades anywhere.The Temple of Artemis, as imagined in this hand-coloured engraving by Martin Heemskerck (1498 - 1574), has the "old-fashioned" look of Santa Maria Novella in Florence and other Italian quattrocento churches of the previous generation.In the 7th century, a flood destroyed the temple, depositing over half a meter of sand and flotsam over a floor of hard-packed clay. Among the flood debris were the remains of a carved ivory plaque of a griffin and the Tree of Life, apparently North Syrian, and a number of drilled tear-shaped amber drops of elliptical cross-section. These probably once dressed a wooden effigy of the Lady of Ephesus, which must have been destroyed or recovered from the flood. Bammer notes that though the site was prone to flooding, and raised by silt deposits about two metres between the eighth and 6th centuries, and a further 2.4 m between the sixth and the fourth, its continued use "indicates that maintaining the identity of the actual location played an important role in the sacred organization".
Second phase
The new temple was sponsored at least in part by Croesus, who founded Lydia's empire and was overlord of Ephesus, and was designed and constructed from around 550 BC by the Cretan architect Chersiphron and his son Metagenes. It was some 377' long and 180' wide, supposedly the first Greek temple built of marble. Its peripteral columns stood some 40 feet high, in double rows that formed a wide ceremonial passage around the cella that housed the goddess' cult image. Thirty-six of these columns were, according to Pliny, decorated by carvings in relief. A new ebony or blackened grapewood cult statue was sculpted by Endoios,and a naiskos to house it was erected east of the open-air altar.A rich foundation deposit from this era yielded more than a thousand items, including what may be the earliest coins made from the silver-gold alloy electrum. Fragments of bas-relief on the lowest drums of the temple, preserved in the British Museum, show that the enriched columns of the later temple, of which a few survive were versions of this earlier feature. Pliny the Elder, seemingly unaware of the ancient continuity of the sacred site, claims that the new temple's architects chose to build it on marshy ground as a precaution against earthquakes. The temple became an important attraction, visited by merchants, kings, and sightseers, many of whom paid homage to Artemis in the form of jewelry and various goods. It also offered sanctuary to those fleeing persecution or punishment, a tradition linked in myth to the Amazons who twice fled there seeking the goddess' protection from punishment, firstly by Dionysus and later, by Heracles.

Destruction by Herostratus
The "Croesus" Temple was destroyed on July 21, 356 BC, probably very soon after its completion, in a vainglorious act of arson: one Herostratus set fire to the roof-beams, seeking fame at any cost, thus the term herostratic fame.A man was found to plan the burning of the temple of Ephesian Diana so that through the destruction of this most beautiful building his name might be spread through the whole world.
The Ephesians, outraged, sentenced Herostratus to death and forbade anyone from mentioning his name, under pain of death. However, Theopompus later noted the name. The burning supposedly coincided with the birth of Alexander the Great; Plutarch remarked that Artemis was too preoccupied with Alexander's delivery to save her burning temple.