The Queen's Chapel is a chapel in central London, England, that was designed by Inigo Jones and built between 1623 and 1625 as an external adjunct to St. James's Palace for the Roman Catholic queen Henrietta Maria.
 It is one of the facilities of the British monarch's personal religious establishment, the Chapel Royal, and should not be confused with the 1540 building known as the Chapel Royal within the palace and just across Marlborough road.
John Christian Curwen, born John Christian (12 July 1756 – 11 December 1828) was an English Member of Parliament and High Sheriff.
John Christian Bailar Jr. (May 27, 1904 – October 17, 1991) was a professor of Inorganic Chemistry at the University of Illinois at Urbana-Champaign.
 He received his B.A. at the University of Colorado and his Ph.D. at the University of Michigan.
 At the University of Illinois, he developed an active research program on coordination chemistry.
 He is referred to as the “Father of Coordination Chemistry in the United States,” as prior to his time, this area of chemistry received little attention in the U.S.
 The Bailar twist in coordination compounds is named after him.
 He helped found the book series "Inorganic Syntheses" and the journal "Inorganic Chemistry".
 His work was widely recognized culminating in the award of the Priestley Medal from the American Chemical Society, an organization of which he was also president.
 He was the father of two sons, one of whom was John Christian Bailar III.
John Christian Jacobi, also Johann Christian Jacobi, (1670-1750) was a German-born translator and dealer in religious books, particularly those connected with Halle Pietism.
 He served as keeper of the Royal German Chapel, St James's Palace from 1714 until his death.
Johann Christian Jacobi (1719 – 1784) was a German oboist and composer of the Baroque period.
The Sistine Chapel ( ; Latin: "Sacellum Sixtinum" ; Italian: "Cappella Sistina" ] ) is a chapel in the Apostolic Palace, the official residence of the Pope, in Vatican City.
 Originally known as the "Cappella Magna", the chapel takes its name from Pope Sixtus IV, who restored it between 1477 and 1480.
 Since that time, the chapel has served as a place of both religious and functionary papal activity.
 Today it is the site of the Papal conclave, the process by which a new pope is selected.
 The fame of the Sistine Chapel lies mainly in the frescos that decorate the interior, and most particularly the Sistine Chapel ceiling and "The Last Judgment" by Michelangelo.
John Christian Watson (born John Christian Tanck; 9 April 186718 November 1941), commonly known as Chris Watson, was an Australian politician who served as the third Prime Minister of Australia.
 He was the first Prime Minister from the Australian Labour Party, and led the world's first Labour Party government, indeed the world's first socialist or social democratic government, at a national level.
 From paternal German and maternal British ancestry, he is the only Australian Prime Minister not born in a Commonwealth country.
St James's Palace is the most senior royal palace in the United Kingdom.
 Located in the City of Westminster, although no longer the principal residence of the monarch, it is the ceremonial meeting place of the Accession Council and the London residence of several members of the royal family.
[File:John Christian Elden.jpg|thumb|John Christian Elden]]
St Stephen's Chapel, sometimes called the Royal Chapel of St Stephen, was a chapel in the old Palace of Westminster which served as the chamber of the House of Commons of England and that of Great Britain from 1547 to 1834.
 It was largely destroyed in the fire of 1834, but the Chapel of St Mary Undercroft in the crypt survived.

Question: John Christian Jacobi served as keeper of the Royal German Chapel at a Palace locted in what city?
Answer: City of Westminster