By the mid-12th century throughout Western Europe, Western knights replaced traditional round shields with the elongated, teardrop-shaped kite shield. This innovative design extended significantly downward to cover the rider's vulnerable left leg and knee when mounted, while its rounded top preserved peripheral vision. Constructed from laminated wood wrapped in tough rawhide, it offered comprehensive bodily protection that proved essential during the high-stakes cavalry charges of the Crusades.

The sweeping flat canvas of the kite shield directly catalyzed the development of formal heraldry, as knights needed painted symbols to identify themselves when fully enclosed in armor. This heraldic language quickly became a primary vocabulary for medieval troubadours and courtly romance poets like Chrétien de Troyes.