The Omu Empire was a mighty kingdom that reigned long ago, before even House Vidalis was around. They ruled over the land of Chult, later renamed to the Swamps of Ichtaka. Not much is known about them. The only ruling person we learn of is Queen Zalcoré.
As homage to deceased rulers, giant statues would be erected in the gardens of Nangalore, and their ashes placed in an urn before them.