The Tyrian armor is a set of armor art for the 6 coreprofessions from the Prophecies Campaign. In Prophecies, Tyrian armor is referred to as "Profession's" armor (profession of the class each set is for) by armor crafters except for max level armor which is referred to as "Tyrian".
In the Factions Campaign, the Tyrian Armor art makes a comeback for the core professions, and is available as one of the two hidden-away armor arts available in explorable areas.
The corresponding armors for the Factions Campaign professions are called Exotic Armor, and is crafted by the same crafter. There is also an Ascended version of the Exotic Armor, but the crafter, Wei Qi, does not make anything for the core professions.