Altar

An altar was a building type in Warcraft III: Reign of Chaos and Warcraft III: The Frozen Throne. They built and revived hero units.

Types

 * Human Alliance - Altar of Kings
 * Orcish Horde - Altar of Storms
 * Undead Scourge - Altar of Darkness
 * Night Elf Sentinels - Altar of Elders
 * Naga - Altar of the Depths
 * Murlocs - Altar of the Deep

In World of Warcraft

 * Altars of kings and troll altars of storms both appeared in various locations in the World of Warcraft alpha. They were removed before beta, but still exist in the game files.
 * An altar of darkness appears in the Undercity's War Quarter.