The Symbolic Set
Armor Type: Plate
Level Req.: 40 for the Symbolic set itself, 80 with extras
Source: BoE World Drops
Availability: Not easily farmable, checking the Auction House regularly is the best option
How to get the set:
Items of the Symbolic set drop from random creatures between level 35 and level 45 in Azeroth. Since there is no specific source with a high drop rating, browsing the Auction House is the best place to find items of this set.
Note: There are a couple of extra items in the Symbolic set that are not depicted here, fx an interesting looking triangular shield. You can find them on this Wowhead link.