Hirol's Defense armor set

History
Armor of Paragon Hirol, pioneer of methods to improve golem resilience and power.

Item locations in order of appearance:

Greaves can be found before you enter the thaig itself, in a container where you are attacked by Deep stalkers, and darkspawn attack from the path above. Remember to pick them up before you head further as going back can be a pain. You will find them as Ancient Boots. Take them to the Forge in Kal'Hirol - Trade Quarter. You will find a golem standing by an anvil. Use the anvil to receive the Greaves of Hirol's Defense.

Breastplate of Hirol's Defense is found in a "damaged" state (unwearable like the greaves) in a side chamber of Kal'Hirol - Main Hall between the Commons and Slums. Like the greaves, take it to the Forge in Kal'Hirol - Trade Quarter and use the anvil to receive the Breastplate (need not make multiple trips).

Gloves can be found by solving the rune puzzle in the Kal'Hirol - Trade Quarter. (Match the rune colors on the floor with the ones on the statues)

Helmet can be found in the forked pathway of the Kal'Hirol Trade Quarter just before you go to the lower area. The left way has some stairs and the other way leads to the lower area and an exit to the Knotwood Hills. Head up the stairs. Its in one of the containers.

Trivia

 * The Hirol Defense Armor is some what a "Poster Icon" as it's the armor visibly shown on the Warden through out the most of the Dragon Age: Origins - Awakening trailers.
 * It is also seen as the armor that Alistair is wearing at Vigils Keep depending wether you made him king or not (if he's not king in Origins, you won't see him in Awakening)