This is how William Blake understood art at the end of his life, in 1826 or 1827.
As of the early twenty-first century, this is one of the fortresses where art is watched over by Fasolt and Fafner, the giants who once decreed that the gold of the Rhine be piled so high it would hide Brünnhilde from view. Click the link for details and investment advice.
But the architecture had been anticipated by Blake. Look up top and see: