Heraldry began as a system of personal identification that enabled
knights to identify friends and foes in battle (Document 66). Each man
adopted a color and easily recognizable pattern or image to place on his
shield; this became his coat of arms and made him recognizable when
fully armed. Women also adopted coats of arms. We have noted the
castle emblems of Queen Blanche of Castile. The complex patterns of
heraldry required highly trained specialists who not only identified
owners but also made sure that each design was unique. Heralds had an
official organization and training program, and they kept records of
coats of arms. Eventually, coats of arms decorated and identified armor,
clothing, personal belongings, flags, banners, and buildings. Cities,
states, guilds, associations, churches, and colleges adopted coats of arms.
Gateways were decorated with shields and heraldic banners flew from
towers.