Leonardo da Vinci excelled in the fields of art and science ... Now, scientists have uncovered a hidden feature underneath a medieval castle in Milan, Italy, that researchers once could only ...

Sketches from around 1495 by the renowned inventor reference underground passageways underneath the medieval castle which were ... we know that most of his drawings, especially the architectural ...

Professor Richard Holmes, a British military historian featured in the NOVA film "Medieval Siege," talks here about everyday life in a medieval English castle, giving a sense of how lords and ...