The Gate

The Gate is the lowest level of the Heavenly Realms, which are the top three dimentions. Just below them is Purgatory.

Nature
The Gate is a locked dimention that acts as a barrier, preventing lesser beings from entering the higher dimentions. It appears as a palace or castle in the sky. At the back of the castle is a large gate, and through this gate is a Stairway upwards.

The Titans
The Gate is inhabitted by Titans, who guard ascent upwards and keep the Gate from being invaded. The existance of the Titans is the only reason that Valearia was allowed to keep its Stairway.