An oak throne can be built in the throne hotspot of the Throne Room in a player-owned house. It requires 60 Construction, 5 oak planks, 1 marble block to build, and gives 800 experience. A throne can be sat upon by any player who has access to the house in which it was built.
The oak throne is a large oak chair with a spiked top and a marble base.
Note: Building any thrones in the throne room will make both thrones appear in both spots, so the player does not need to build the same throne twice, nor can players mix and match which thrones to build.