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What breakthroughs did the ancient Romans make in building materials and construction technology?

Breakthrough progress: building structure, arch coupon technology.

It not only has good bearing characteristics under vertical load, but also plays the role of decoration and beautification. Its shape is arc, and the form of arch coupons varies slightly due to different building types.

Semicircular arch coupons are an important feature of ancient Roman architecture, while pointed arch coupons are an obvious feature of Gothic architecture, while Islamic arch coupons are pointed, horseshoe-shaped, arched, trilobal, compound leaf-shaped and stalactite-shaped. The arch ticket structure is one of Rome's greatest achievements.

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Europe: Britain, France, Belgium, Luxembourg, Spain, Portugal, Andorra, Monaco, Germany, Switzerland, Liechtenstein, Italy, Vatican, San Marino, Czech Republic, Slovakia, Hungary, Slovenia, Croatia, Bosnia and Herzegovina, Serbia, Montenegro, Albania, Macedonia, Romania, Bulgaria, Greece and Malta.

Asia: Turkey, Cyprus, Syria, Lebanon, Jordan, Saudi Arabia, Israel and Palestine.

Africa: Morocco, Tunisia, Algeria, Libya, Egypt.