Marble Arch

Stand still for a moment and listen. Traffic moves on every side of you: black cabs, red buses, the low hum of engines turning towards Park Lane and Oxford Street. In the middle of all that noise is a pale block of stone. Walk closer and run your eyes over the surface. It is not quite white any more. It is softly grey, streaked and polished by weather and city air. This is Marble Arch, and it was never meant to stand here.

The arch began life as a grand front door. In the 1820s, King George the Fourth was turning Buckingham House into a palace. His favourite architect, John Nash, was asked to design a ceremonial entrance for the new forecourt. Nash looked to ancient Rome for his model. He took his inspiration from the Arch of Constantine, the great triumphal gateway that stands beside the Colosseum. Work began in 1827, and the arch was finished in the early 1830s.

The name tells you the material. The arch is faced with white Carrara marble from the quarries of Tuscany, in northern Italy. Michelangelo chose stone from the same quarries for his sculptures. In London, that stone has had a harder life. Look at the edges of the columns and the carved panels. Rain, frost and nearly two centuries of soot have softened the details. Some areas are darker and some areas are cleaner, so the stone shows its age unevenly.

Now here is the first surprise. The arch was meant to carry a king on its summit. The plan placed a bronze statue of George the Fourth on horseback at the very top. The king died in 1830, before the project was complete, and the costs of his palace had grown enormous. Nash was removed from the work. The equestrian statue never went up here. Instead, it now stands on a plinth in Trafalgar Square, a short ride east of you.

So why is the arch here, at the corner of Hyde Park, and not at the palace? In the 1840s, Buckingham Palace grew a new east wing. That wing closed off the open courtyard, and the arch no longer had a clear purpose there. In 1851, the same year as the Great Exhibition in Hyde Park, the arch was taken down and rebuilt on this spot. It became a grand entrance to the park instead.

You may hear a popular tale about this move. According to the story, the arch was too narrow for the royal state coach, so it had to go. It is a good story, and guides have told it for generations. Historians generally treat it as a myth. The more ordinary explanation is the palace extension. Still, the legend survives, because people like the idea of a king's gateway that failed to fit the king's carriage.

The second surprise is inside the stone. The arch is not solid. It contains small rooms, and for many years they reportedly housed a police station. Officers could watch over the park entrance and the crowds from inside the monument itself. Today the rooms are closed to the public. As you walk around the base, try to imagine a working office tucked behind those marble walls, with constables coming and going through a door in a royal monument.

There is also a ceremonial rule attached to this gateway. By long tradition, only senior members of the royal family and certain ceremonial units, such as the King's Troop of the Royal Horse Artillery, may pass through the central arch on formal occasions. Everyone else walks around it. Look at the tall gates within the openings. They are made of decorated metalwork, and they remind you that this was designed as a door, not as a passage for daily traffic.

The ground under this traffic island has a darker past. This area is close to the site of Tyburn, the place where London carried out public executions for centuries. Crowds gathered here to watch hangings at the famous Tyburn Tree, a wooden gallows. Executions at Tyburn ended in the late eighteenth century, decades before the arch arrived. A small round stone set into the roadway nearby marks the approximate location of the old gallows. It is easy to miss among the traffic.

In the 1960s, the roads around Hyde Park were rebuilt and widened. Park Lane became a major traffic route, and the arch ended up on an island in the middle of the junction. That is why it feels slightly cut off today. The monument is no longer joined to the park by a clear path. Instead, you reach it through crossings and subways. Some visitors find this sad. Others find it very London, with a palace gateway surrounded by buses.

Turn slowly and look at what surrounds the arch. To the east, Oxford Street begins, with its long line of shops and department stores. To the north, Edgware Road runs out of the city, following the line of an old Roman road. To the south and west lies Hyde Park. Near the park corner, you will find Speakers' Corner, where people have long gathered to make speeches about anything they choose. On Sunday mornings you may still hear voices rising there.

Near the arch, look for a very large bronze sculpture of a horse's head. Its nose points down, as if the horse is drinking from the ground. The work is called Still Water, by the sculptor Nic Fiddian-Green. It is a modern piece, yet it fits this spot in a quiet way. For centuries, horses carried riders and carriages along these roads. The sculpture gives the busy junction a moment of calm, and it is a popular place for photographs.

When you are ready to leave, take one last look at the arch from a distance. From the park side, the columns line up and the Roman shape becomes clear. From the Oxford Street side, it looks smaller, almost hidden by the buses. Notice how the light changes on the marble as clouds move overhead. This gateway was built for a king and then moved for a park. Today it stands mainly for the people of London, who walk past it every day.