The poem is Halls grew darker by Aleksandr Blok, a Russian poet. Its a lovely poem, definitely one of my favorites!

Thats not the complete poem though, this is it:

Halls grew darker by Aleksandr Blok
Halls grew darker and somehow faded.
Grates of windows drowned in black.
Every knight, every beautiful lady
Knew the tiding: "The Queen's deadly sick."

And the king, very silent and frowned,
Passed the doors, lost of pages and slaves ...
Every word, that by chance cast around,
Proved the truth of the closing grave.

By the doors of the silent abode
I was crying, while pressing the brace ...
At the end of the passage remote
Someone echoed me, hiding his face.

By the doors of the Beautiful Lady
I was sobbing, attired in blue ...
And the stranger of ashen face sadly
Echoed me all my sufferings through.