Context: State banquets also take place in the Ballroom; these formal dinners are held on the first evening of a state visit by a foreign head of state. On these occasions, for up to 170 guests in formal "white tie and decorations", including tiaras, the dining table is laid with the Grand Service, a collection of silver-gilt plate made in 1811 for the Prince of Wales, later George IV. The largest and most formal reception at Buckingham Palace takes place every November when the Queen entertains members of the diplomatic corps. On this grand occasion, all the state rooms are in use, as the royal family proceed through them, beginning at the great north doors of the Picture Gallery. As Nash had envisaged, all the large, double-mirrored doors stand open, reflecting the numerous crystal chandeliers and sconces, creating a deliberate optical illusion of space and light.

Question: Where do State Banquets take place?
Answer: the Ballroom

Question: In what month does the Queen entertain the diplomatic corps?
Answer: November

Question: What is used to set the dining table for formal dinners?
Answer: the Grand Service

Question: When was the Grand Service made?
Answer: 1811

Question: For whom was the Grand Service made?
Answer: the Prince of Wales

Question: Where do state banquets take place?
Answer: in the Ballroom

Question: When are state banquets held?
Answer: the first evening of a state visit by a foreign head of state

Question: What is the dining table laid with for state banquets?
Answer: the Grand Service

Question: Who was the Grand Service originally made for?
Answer: Prince of Wales

Question: Where are State Banquets forbidden?
Answer: Unanswerable

Question: What month does the Queen promote the diplomatic corps?
Answer: Unanswerable

Question: What is used to set the dining table for casual dinners?
Answer: Unanswerable

Question: When was the Grand Service removed?
Answer: Unanswerable

Question: When are state banquets avoided?
Answer: Unanswerable