George IV (George Augustus Frederick; 12 August 1762 – 26 June 1830) was King of the United Kingdom of Great Britain and Ireland and of Hanover following the death of his father, George III, on 29 January 1820, until his own death ten years later.
 From 1811 until his accession, he served as Prince Regent during his father's final mental illness.
The Duke of York Column is a monument in London, England, to Prince Frederick, Duke of York, the second eldest son of King George III.
 The designer was Benjamin Dean Wyatt.
 It is sited where Regent Street meets The Mall, a purposefully wide endpoint of Regent Street known as Waterloo Place and Gardens, in between the two terraces of Carlton House Terrace and their tree-lined squares.
 The three very wide flights of steps down to The Mall adjoining are known as the Duke of York Steps.
 The column was completed in December 1832 and the statue of the Duke of York, by Sir Richard Westmacott, was raised on 10 April 1834.
The Regency in Great Britain was a period when King George III was deemed unfit to rule and his son ruled as his proxy as Prince Regent.
 On the death of George III in 1820, the Prince Regent became George IV.
 The term Regency (or Regency era) can refer to various stretches of time; some are longer than the decade of the formal Regency which lasted from 1811–1820.
 The period from 1795 to 1837, which includes the latter part of the reign of George III and the reigns of his sons George IV and William IV, is often regarded as the Regency era, characterised by distinctive trends in British architecture, literature, fashions, politics, and culture.
 The Regency era ended in 1837 when Queen Victoria succeeded William IV.
The Campo Iemini Venus is a marble sculpture of the Venus Pudica/Capitoline Venus type.
 It was unearthed in the spring of 1792 among other sculptures in the excavation of a Roman villa at Campo Iemini, near Torvaianica, in Lazio ("illustration, left").
 The dig was directed by the English dealer in Roman antiquities Robert Fagan (1761-1816) under the patronage of Prince Augustus, the Duke of Sussex in partnership with Sir Corbet Corbet (British Museum).
 At the time of its discovery the English in particular found it superior to the Capitoline Venus.
 After restoration in Rome it was shipped to London, where Prince Augustus gave it to his brother the Prince Regent, who set it up at Carlton House.
 After his death, when Carlton House was replaced by a terrace of houses, William IV donated it to the British Museum.
HMS "Prince Regent was a 56-gun British warship that served on Lake Ontario during the War of 1812.
 "Prince Regent" was built at the Kingston Royal Naval Dockyard in Kingston, Upper Canada and launched on 14 April 1814.
 Rated as a fourth-rate frigate, "Prince Regent" took part in the Raid on Fort Oswego in 1814.
 Following the War of 1812 the frigate was renamed HMS "Kingston on 9 December 1814.
 In 1817, the vessel was placed in reserve following the Rush-Bagot Treaty that demilitarized all the lakes along the United States-Canada border.
 Discarded in 1832, the vessel found no buyer and sank in Deadman Bay off Kingston after 1832.
A Carlton House desk is a specific antique desk form within the more general bureau à gradin form.
 This form of desk is supposed to have been designed in the 18th century for the Prince of Wales (who later became George IV) by George Hepplewhite.
 It is named after Carlton House, which was at the time the London residence of the Prince, and sometimes is also known as a Carlton House writing table.
Carlton House was a mansion in London, best known as the town residence of the Prince Regent for several decades from 1783.
 It faced the south side of Pall Mall, and its gardens abutted St. James's Park in the St James's district of London.
 The location of the house, now replaced by Carlton House Terrace, was a main reason for the creation of John Nash's ceremonial route from St James's to Regent's Park via Regent Street, Portland Place and Park Square: Lower Regent Street and Waterloo Place were originally laid out to form the approach to its front entrance ("illustration, right").
Carlton House Terrace is a street in the St James's district of the City of Westminster in London.
 Its principal architectural feature is a pair of terraces of white stucco-faced houses on the south side of the street overlooking St. James's Park.
 These terraces were built on Crown land between 1827 and 1832 to overall designs by John Nash, but with detailed input by other architects including Decimus Burton.
 They took the place of Carlton House, and the freehold still belongs to the Crown Estate.
The Carlton House Block is a historic commercial and retail block at 9-13 Hampden Street in Springfield, Massachusetts.
 The six-bay three story brick building was built in 1875 with Italianate detailing.
 Its name derives from its site, which was previously the location of the Carlton House Hotel.
 It was built for lease to one of the leading shoe and boot wholesale manufacturers in the area; they occupied the premises until 1897, after which it has seen a variety of tenants.
 The building was listed on the National Register of Historic Places in 1983.
Coade stone or Lithodipyra (Ancient Greek ("λίθος"/"δίς"/"πυρά"), "stone fired twice") was stoneware that was often described as an artificial stone in the late 18th and early 19th centuries.
 It was used for moulding Neoclassical statues, architectural decorations and garden ornaments that were both of the highest quality and remain virtually weatherproof today.
 Produced by appointment to George III and the Prince Regent, it features on St George's Chapel, Windsor; The Royal Pavilion, Brighton; Carlton House, London; the Royal Naval College, Greenwich; and a large quantity was used in the refurbishment of Buckingham Palace in the 1820s.

Question: What Prince Regent likely stayed in Carlton House in 1811?
Answer: George IV