Heraldry is the art and system of designing, displaying, and recording coats of arms, those colorful shields covered with symbols that knights and noble families used in medieval Europe. Each coat of arms was unique, like a visual name tag that identified who was inside a suit of armor or whose castle you were approaching.

Heraldry developed around 900 years ago when armor completely covered a knight's face, making it impossible to tell friend from enemy on the battlefield. Knights painted bold symbols on their shields: lions, eagles, crosses, stripes, and geometric patterns in bright colors like red, blue, and gold. These weren't random decorations. Each design belonged to a specific person or family and followed strict rules about which colors could touch and what symbols meant.

Professional heralds memorized thousands of these designs and made sure no two families used the same one. They recorded them in special books and announced knights at tournaments, calling out their names and describing their coats of arms. The language of heraldry is still used today: a lion “rampant” (standing on its hind legs), colors called by French names like azure (blue) and gules (red), and shields divided into specific sections.

Today, heraldry appears on flags, school emblems, sports team logos, and official seals. Many European families still maintain their ancestral coats of arms, and countries like England have official heralds who grant new ones.