Question: Dumfriesshire was a county constituency represented in the House of Commons of Great Britain, at The Palace of Westminster is the meeting place of the House of Commons and the House of Lords, from 1801 until which year?
Sentence (from "Palace of Westminster"): Commonly known as the Houses of Parliament after its occupants, the Palace lies on the north bank of the River Thames in the City of Westminster, in central London.
Relevant evidence: No