Archaeologists working near the modern city of Haltern am See have unearthed a remarkably preserved Roman artillery training academy. The site, which served the Roman legions on the Germanic frontier, contains the charred remains of several wooden catapults and ballistae used for practice. Because the site was buried under anaerobic clay, many of the tensioning mechanisms and wooden frames remain structurally intact, offering new insights into Roman engineering.
The most surprising find is a collection of wax-coated wooden tablets that feature geometric diagrams and ballistic calculations for different wind conditions. This suggests that Roman artillerymen underwent a highly technical education, using mathematical models to calibrate their siege engines for maximum accuracy during the empire's northern campaigns.