Here

This is the mansion built for me
By the sweating centuries;
Roofed with intertwined tree,
Woofed with green for my princelier ease.
Here I lie with my world about me,
Even as my thoughts embosom me
From wayside humanity.
And here can only enter who
Delight me- the unpriced few.
Come you in, and make you cheer,
It draweth toward my banquet-time.
Would you win to my universe,
Your thoughts must turn in the words of rhyme.
Loose the chain of linked verse,
Stoop your knowledge, and enter here!

I have no idea who wrote this or where I found it.