The Armor of Mannoroth

The Armor of Mannoroth was located in Valley of Wisdom in Orgrimmar before Cataclysm. Mannoroth's skull was also hung on the dead tree that had been bleached white by the sun.

On a plate mounted to a stone between the "forelegs" of the tree on which the armor is mounted is the following inscription:

Note that this plate is missing in the "instanced" version of Orgrimmar immediately preceding the Battle for the Undercity.

As of patch 4.0.3a, Mannoroth's armor and skull have been removed from the Valley of Wisdom. Garrosh Hellscream had the ends of Mannoroth's tusks fashioned into shoulder armor. This is shown by the fact that the skull, which hangs above Garrosh's new throne, had its tusks cut off. Mannoroth's shoulderpads and chains were also used for the throne.

As the tree resembles a general outline of annihilan body, it could have been shaped by tauren druids to accommodate the trophies.