Victoria Tower in the context of "Royal Standard of the United Kingdom"

Piccadilly (/ˌpɪkəˈdɪli/) is a road in the City of Westminster, London, England, to the south of Mayfair, between Hyde Park Corner in the west and Piccadilly Circus in the east. It is part of the A4 road that connects central London to Hammersmith, Earl's Court, Heathrow Airport and the M4 motorway westward. St James's is to the south of the eastern section, while the western section is built up only on the northern side. Piccadilly is just under 1 mile (1.6 km) in length, and it is one of the widest and straightest streets in central London.

The street has been a main thoroughfare since at least medieval times, and in the Middle Ages was known as "the road to Reading" or "the way from Colnbrook". Around 1611 or 1612, Robert Baker acquired land in the area, and prospered by making and selling piccadills. Shortly after purchasing the land, he enclosed it and erected several dwellings, including his home, Pikadilly Hall. What is now Piccadilly was named Portugal Street in 1663 after Catherine of Braganza, wife of Charles II, and grew in importance after the road from Charing Cross to Hyde Park Corner was closed to allow the creation of Green Park in 1668. Some of the most notable stately houses in London were built on the northern side of the street during this period, including Clarendon House and Burlington House in 1664. Berkeley House, constructed around the same time as Clarendon House, was destroyed by a fire in 1733 and rebuilt as Devonshire House in 1737 by William Cavendish, 3rd Duke of Devonshire. It was later used as the main headquarters for the Whig party. Burlington House has since been home to several noted societies, including the Royal Academy of Arts, the Geological Society of London, the Linnean Society, and the Royal Astronomical Society. Several members of the Rothschild family had mansions at the western end of the street. St James's Church was consecrated in 1684 and the surrounding area became St James Parish.

Old Palace Yard is a paved open space in the City of Westminster, England. It lies between the Palace of Westminster to its north and east and Westminster Abbey to its west. It is known as the site of executions, including those of Sir Walter Raleigh, Guy Fawkes and other conspirators of the Gunpowder Plot, and James Hamilton, 1st Duke of Hamilton, following the Battle of Preston.

St Margaret Street/Abingdon Street divides Old Palace Yard into two parts, running diagonally from the north-west to the south-east. The eastern, larger part belongs to the grounds of the Palace of Westminster, the seat of the Parliament of the United Kingdom. To the north of the Yard is St Stephen's Entrance, the public entrance into the Palace, as well as the great South Window of Westminster Hall. Standing near this window and facing away from it is a bronze equestrian statue of Richard Coeur de Lion (King Richard I, also known as "Richard the Lionheart"). Created by Baron Carlo Marochetti, the statue was completed in 1856 and installed in its present location in 1860. The eastern side of Old Palace Yard is defined by the West Front of the Palace, which is part of the precincts of the House of Lords; the carriage porch of the Peers' Entrance marks the middle of this frontage, and the Victoria Tower its southern end.