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Zhaozhou (or Anji) Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 0-1000DateCreated: 605 ADXiao RiverZhaoxianState: HebeiCountry: ChinaWebsite: Chun, Li

Ancient Chinese literature refers to the Zhaozhou Bridge as a "crescent moon rising from the clouds" or a "rainbow in the sky."  Throughout its history, it has been known as the Anchi or Anji Bridge (literally "safe crossing"), the Dashi Bridge ("big stone"), and the Dashiqiao ("great stone") Bridge.

Image Credit: Public Domain (Author's Choice)Image Caption: Zhaozhou (or Anji) BridgeEra_date_from: 605 AD
Hagia Sophia
Society: ASCEMain Category: CivilSub Category: BuildingsEra: 0-1000DateCreated: 537So?uk Çe?me Sk 2-14 Cankurtaran Mh.IstanbulCountry: TurkeyWebsite: Unknown

The church of Hagia Sophia (literally "Holy Wisdom") in Constantinople, now Istanbul, was first dedicated in 360 by Emperor Constantius, son of the city's founder, Emperor Constantine. Hagia Sophia served as the cathedra, or bishop's seat, of the city. Originally called Megale Ekklesia (Great Church), the name Hagia Sophia came into use around 430. The first church structure was destroyed during riots in 404; the second church, built and dedicated in 415 by Emperor Theodosius II, burned down during the Nika revolt of 532, which caused vast destruction and death throughout the city.

Image Credit: Courtesy Flickr/David Spender (CC BY 2.0)Image Caption: Hagia SophiaEra_date_from: 537
Acueducto de Segovia
Society: ASCEMain Category: CivilSub Category: Water Supply & ControlEra: 0-1000DateCreated: First century ADCalle Teodosio El GrandeSegoviaState: SEGZip: 40001Country: SpainWebsite: Emperor Trajan

For 2,000 years, Aqueducto de Segovia has been conveying drinking water from the Frio River to Segovia, approximately 18 kilometers away. Built under the reign of Roman emperor Trajan, the aqueduct is one of the most intact and best-preserved Roman engineering masterpieces. Roman engineers built the channel of the aqueduct with an average one percent gradient over its whole length.

Image Credit: Courtesy Flickr/Nigel's Europe (CC BY-SA 2.0) Image Caption: A view from below of the highly symmetrical Segovia AqueductEra_date_from: First century AD
Acquedotto Traiano-Paolo
Society: ASCEMain Category: CivilSub Category: Water Supply & ControlEra: 0-1000DateCreated: 109-110RomeState: RICountry: ItalyWebsite: Emperor Trajan

The roman emperor Trajan ordered a new aqueduct be built to bring fresh water to Italy's Trastevere region and parts of Rome. The water is collected from five springs that feed the lake at Bracciano, and traverses over 25 miles into Rome. To maintain an even gradient, the aqueduct follows a meandering alignment through the countryside to avoid hills and major valleys. The water runs through an open-channel canal that is either arch-supported, at-grade, or underground.

Image Credit: Courtesy of Sovraintendenza ai Beni Culturali.Image Caption: The Acquedotto Traiano-Paolo still brings water to Rome.Era_date_from: 109
Prehistoric Mesa Verde Reservoirs
Society: ASCEMain Category: CivilSub Category: Water Supply & ControlEra: 0-1000DateCreated: 750-1180Mesa Verde National ParkMontezuma CountyState: COZip: 81330Country: USAWebsite: Ancient Pueblo Peoples

Four prehistoric reservoirs at Mesa Verde National Park were constructed and used between AD 750 and AD 1180. They are: Morefield Reservoir (in Morefield Canyon), Far View Reservoir (on Chapin Mesa), Sagebrush Reservoir (on an unnamed mesa), and Box Elder Reservoir (in Prater Canyon). These four ancient reservoirs represent extraordinary engineering achievements by the Ancestral Puebloan people. In an arid environment with very little surface water, these prehistoric people found ways to route and capture runoff to create sustainable domestic water supply reservoirs.

Image Credit: Courtesy Wikipedia/McGhiever (CC BY-SA 3.0)Image Caption: Prehistoric Mesa Verde ReservoirsEra_date_from: 750
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