The earliest seals showed him dressed in a simple robe and standing on the downed and pierced dragon; only in the Middle Ages and then again towards the end of the 19th century, he was transformed into a knight, complete with a set of armor, a helmet, a shield and more.
In the earliest seals, he appeared dressed simply in a robe and standing over the fallen and pierced dragon. It wasn't until the Middle Ages and again towards the end of the 19th century that he was depicted as a knight, complete with armor, helmet, shield, and other accoutrements.