The House of Lords

"' The 'Ouse of Lords,' put in the old man reminiscently. ' The House of Lords, if you like...'" (Orwell, 91).

The House of Lords is a branch of Parliament in England that has existed since the 13th century. The House of Lords was (in this novel) a old form of government that no longer existed in the Party's society. Interestingly enough, the old prole remembered its existence, once again proving that the Party didn't have as much control as it thinks it does.

Links:
http://www.britannica.com/EBchecked/topic/348064/House-of-Lords