The building is made of stone
See the link below
The Palace of Westminster is on Parliament Square.
Big Ben is at he eastern end of the Palace of Westminster.
The Palace of Westminster was built in the Victorian era and the architectural fashion at the time was to build mock Gothic buildings.
The Palace of Westminster is the alternative name for the Houses of Parliament and all British laws are debated and enacted from there.
Buckingham Palace is where the Queen resides when she is in London.
The Palace of Westminster.
Big Ben
The Parliament of the United Kingdom sits there.
The Clock Tower of the Palace of Westminster is the official name for what people often call 'Big Ben'.
Hampton Court Palace and the Palace of Westminster
If you mean Big Ben. It was a part of the design for the new palace, after the old Palace of Westminster was largely destroyed by fire on the night of 16 October 1834.
Houses of Parliament