We Finally Know Why Ancient Roman Concrete Lasts Thousands of Years

Nearly 2,000 years ago, the Romans built a structure so precise it still towers over the heart of Segovia today. The Aqueduct of Segovia isn’t a ruin—it’s a working miracle of ancient engineering. Constructed around the turn of the 2nd century AD, likely during the reign of Emperor Trajan, it carried fresh water nearly 10 miles from the Frío River, bridging a valley more than 100 feet deep. Over 24,000 granite blocks were stacked into 165 arches—without mortar. Every stone was measured, balanced

Roman Concrete Construction | Overview & Examples

The Secrets of Ancient Roman Concrete | HISTORY