65.5 x 48 cm. (25.7 x 18.9 in.) 85 x 67 x 2 cm. (33.4 x 26.3 x 0.7 in.) ...

Art, history, and modern technology helped researchers unveil hidden tunnels beneath Milan’s Castello Sforzesco (Sforza Castle), structures that perfectly match sketches made by Leonardo da Vinci over ...