The Templar Archives is generally constructed in all Protoss match-ups for access to the High Templar. These units feature other potent spells and attack abilities. Two High Templars and Dark Templar can also be merged into Archons and Dark Archons respectively. Dark Templars are extremely useful combat units, both for harassment with their cloaking ability and as a powerful melee unit. High Templars are devastatingly powerful spell casters, particularly for its Psi Storm. The two units unlocked by the Templar Archives are powerful ground units.

The Templar Archives is powered by a Pylon, but even if this Pylon were destroyed, the Protoss would still be able to produce High Templars and Dark Templars. The Templar Archives' own Plasma Shield can be upgraded at the Forge. The Templar Archives does not build any units directly, but it is vital for the various units unlocked and upgrades made available.

In addition, the Templar Archives allow the unlocking of level 2 and 3 ground weapon and armor at the Forge. The structure allows the Protoss to produce High Templars and Dark Templars from the Gateway. The Templar Archives is an advanced Protoss tech building.