At this time, heraldry was only used in places such as flags, shields, and armor and vestments of the nobility, and was mostly used in military matters, and was less common than in other aspects compared to the late Middle Ages.

As the creator and promoter of heraldry, William applied heraldry to media such as document seals, wax, flags, and crafts such as woodcuts, stone carvings, embroidery, enamel, and stained glass, rather than just painting the surface of shields and armor, just like the ring he wore in his hand at this time, on which his coat of arms was engraved.

Of course, because the coat of arms designed by William is too complicated, the full version can probably only appear on the flag, while the coat of arms on the shield, seal, power ring, etc. is a simplified version, that is, the two shields of the lion and the eagle are removed, as well as the crown on the coat of arms, and only the pattern style inside the coat of arms is retained.

Since ancient times, "what is good at the top, what is good at the bottom must be followed" has been an unbreakable truth from ancient times to the present, because William admired heraldry, the nobles in the kingdom were all keen to study heraldry, and were proud to receive the coat of arms given by William.

Of course, in addition to the princes and nobles, eunuchs and gentry, people who were born in commoners but have made special contributions to the country, upon application and with the assistance of the nobles who sheltered him, can also be granted the heraldic family coat of arms by the Royal Heraldic Academy, which is a very glorious thing, enough to glorify the ancestors, for example, the family of the great poet Shakespeare was once awarded the heraldic family coat of arms by the Royal Heraldic House of England.

The widespread use of heraldry has also had a profound impact on modern society, and its direct product is the current national flag of various countries, which is the direct successor of heraldry.

In addition, trademarks of various brands, school emblems, vehicle logos, etc., are inherited and developed from heraldry.

Take the car logo as an example, one of the brands is a direct inheritance of the coat of arms of the medieval aristocracy, that is, the Italian alpha. Romeo.

Alpha. Romeo's emblem is the family coat of arms of the Duke of Vesconte in the Middle Ages of Milan, and the cross in the logo is partly derived from the story of the Crusaders' expedition from Milan to China.

As an important minister under William, his uncle Ladolph. Morality. In Normandy, Hubert, Duke of Anjou, received the first new coats of arms from the House of Heraldry.

As a member of the Norman family, Ladolph's coat of arms is also based on the red coat of arms of the two lions, and William drew a distinguishing mark on the red coat of arms of the two lions - a kind of ribbon symbol similar to the pendant hanging on the chest of a war horse, in order to indicate that the Duke of Ladolph is from the side line of the Norman family.

Ladolph's coat of arms has only one cross-division structure compared to William's two cross-divisions, and in addition to the two-lion coat of arms on a red background, there are also the blue coat of arms of the white lion of his two domains, the Duchy of Gascony, and the double-headed eagle green coat of arms of the Duchy of Bowys, which are located on the lower left and upper right of the coat of arms, respectively.

As William's uncle and prime minister of the kingdom, William specifically allowed him to draw a certain crown on his coat of arms to symbolize his noble status.

The coat of arms of the Duke of Hubert was also designed by William himself, and his coat of arms was mainly composed of two parts, one of which was the three-deer green coat of arms, which was the family crest of his family, and the second was the coat of arms of his territory of the Duchy of Anjou - the blue coat of arms of the six golden lions.

Another function of the coat of arms can be seen from the coat of arms of these two men, that is, the genealogy of the nobility, like the coat of arms of the Duke of Ladolph, who has a heraldic mark on the red background of his three lions, which is due to the inheritance of the coat of arms.

The coat of arms of the nobility can only be inherited by one person in its entirety, and the inheritance of the coat of arms also means the inheritance of titles and powers, so in the early days, when a person's father has not died, the son has no right to use the family coat of arms, or needs to make minor changes to the pattern and color of the coat of arms to show the difference from the father, so there is the distinction mark mentioned above.

When the father dies, the sons who are entitled to the fief and title inherit the full family coat of arms, while the remaining sons can only use different coats of arms, but in order to show the connection with the family, they usually only make minor adjustments to the coat of arms.

In addition, marriages between nobles would lead to changes in heraldry, and when one family married another, the coats of arms of both parties would be combined, usually in three ways: quartering, side-by-side, and large and small.

As the name suggests, the man's coat of arms is a large heraldic coat of arms, and a woman's smaller coat of arms is set in the center.

The rule of four is what William called the method of cross division, that is, the shield is divided into four parts, and each part is placed with a complete coat of arms.

From the coat of arms, it is also very intuitive to see who the heir of the family is, and the most important thing is that when there are no male members of a family, who should inherit it, the coat of arms can give its legal basis and basis.

However, William did not incorporate the coat of arms of the Jimena family of Queen Ulraka into his coat of arms, and his coat of arms was more about the title and scope of his rule.

With the exception of Chancellor Ladolph and Duke Hubert, the rest of the nobility no longer enjoyed the treatment of William's own coat of arms.

Radoff and Hubert were William's guardians when he was young, and helped him a lot, Rudolph helped him in times of danger, and even gave him the title of Earl of Evler, while Hubert never left him, not only his right-hand man, but also followed him in the northern and southern wars, expanding the territory, so William specially designed the coat of arms for the two of them.

Of course, the coats of arms designed by the Royal Heraldic Institute were no worse, and under William's guidance, the royal heraldic officers produced more luxurious and complex coats of arms, and these new coats of arms were greatly improved compared to the previous ones.

In addition to ordering heraldic officers to draw the coats of arms of nobles and families, William also ordered royal clerks to design their own coats of arms for the various administrations, counties, and provinces of the kingdom.

The coat of arms of the kingdom administration is simple compared to that of the nobility, and its main body is the objects that symbolize its functions and powers, and the corresponding crown of walls.

For example, the Grand Court of the Kingdom of England is dominated by the three lions with a red background and an olive branch and a scale, the three lions with a red coat of arms symbolize that it belongs to the court of the Kingdom of England, and the balance and olive branch symbolize its justice and role.

Others, such as the coat of arms of the counties and provinces of the kingdom, are roughly copied from the original coat of arms of the local counties and principalities, after all, the counties are administrative divisions reorganized from the counties, and the provinces are composed of one or more principalities.