For centuries, architects relied on thick stone and heavy steel to convey power and ensure safety, leaving secure facilities completely isolated from the outside world. The modern era demanded a radical shift: the illusion of total transparency without sacrificing an ounce of physical protection. The hidden architectural challenge was achieving absolute structural integrity in a material inherently defined by its fragility. As geopolitical threats and organized crime escalated throughout the twentieth century, engineers were forced into a high-stakes arms race against ballistics, developing complex chemical laminates to stop lethal kinetic energy while remaining entirely invisible to the naked eye. This authoritative reference volume uncovers the chemical and structural history of bullet-resistant glazing. From the volatile experiments of the 1930s to the advanced multi-layered polycarbonate matrices used in global embassies today, it details how the engineering of security glass fundamentally transformed executive protection, banking infrastructure, and the design of modern fortresses. Equip yourself with the definitive history of transparent defensive architecture. Consult this essential technical guide to master the mechanics of threat mitigation and understand the invisible barriers protecting global institutions.