Hiroshima Peace Memorial

Stand still for a moment and listen. The Motoyasu River slides past at your feet, slow and green. Somewhere a tram bell rings. Pigeons move along the railing. And in front of you, behind a low fence, stands a broken building with an open iron dome, its ribs bare against the sky.

This is the Hiroshima Peace Memorial, known in Japan as the Genbaku Dome, the Atomic Bomb Dome. It is one of the very few structures that remained standing near the centre of the blast in August 1945. Nothing about it has been rebuilt to look whole again. That is the point. The ruin is kept exactly as a ruin, so that everyone who comes here sees the damage with their own eyes.

Before it was a symbol, it was a busy public building. It opened in 1915 as an exhibition hall for local products, a place to show off the crafts and industries of Hiroshima Prefecture. Its designer was a Czech architect, Jan Letzel, who worked in Japan in the early twentieth century. He gave the city something unusual for its time — a European-style building of brick and stone, with a tall central stair hall and a green copper dome on top.

Picture it in those early decades. Smooth plastered walls. Rows of tall windows. Gardens along the riverbank. Visitors came to see art shows, trade fairs, and displays of local goods. Over the years its name changed, and later it was used by government offices. For about thirty years, it was simply part of ordinary city life — a landmark people used to give directions.

Then came the morning of the sixth of August, 1945, at a quarter past eight. An American bomber dropped an atomic bomb on Hiroshima. It was the first nuclear weapon ever used against a city. The bomb exploded in the air, roughly six hundred metres above the ground, and very close to this building. In a single moment, much of the city around you was destroyed by heat, blast, and fire.

Here is something many visitors miss. The building survived partly because the explosion was almost directly overhead. The force came down from above rather than from the side. So the thick walls under the dome were pushed downward instead of being knocked over. The copper covering of the dome burned away, leaving the steel frame you see today. Everyone inside the building that morning died.

Now turn your eyes a little to the north, toward the nearby bridge where the two rivers meet. The original Aioi Bridge had an unusual T shape, easy to spot from the air. It is widely reported that this shape made it the aiming point for the bomb. The bridge you see now is a later replacement, but it stands in the same place, a short walk from the dome.

After the war, people in Hiroshima did not all agree about this ruin. Some wanted it torn down. For them, it was a painful daily reminder of loss. Others felt it must stay, so the world would not forget. The debate lasted for years. In 1966, the city council decided to preserve the building permanently, and since then it has been carefully reinforced several times to stop it from falling.

Look closely at the walls and you can see that care. Thin steel supports hold the brickwork in place, and some of them are hidden inside the structure. Engineers have worked hard to keep it stable without making it look repaired. The bricks still show cracks and burn marks. Bits of plaster cling to the window frames. Inside the fence, rubble still lies where it fell.

In 1996, UNESCO added the dome to its World Heritage List. UNESCO is the United Nations cultural agency that protects places of global importance. Most World Heritage Sites are famous for beauty or great age. This one is protected for a different reason. It reminds people what nuclear weapons can do, and it stands as a symbol of the hope for peace.

The dome is also part of a much larger design. Across the river lies Peace Memorial Park, laid out after the war by the architect Kenzo Tange. If you stand at the arched Cenotaph in the park and look north, the Flame of Peace and this ruined dome line up in a single straight view. That alignment is deliberate. It links the place of mourning to the place of destruction.

As you walk through the park, you will see bright strings of paper cranes in many colours. Many hang near the Children's Peace Monument. It honours Sadako Sasaki, a girl who became sick with leukaemia years after the bombing. She folded paper cranes while in hospital, and her story turned the crane into a symbol of peace. Schoolchildren from across Japan and the world still send cranes here.

Every year on the sixth of August, the city holds a peace ceremony in the park. At a quarter past eight, a bell rings and people stop for a moment of silence. In the evening, many families float paper lanterns on the river beside the dome. Each lantern carries a message for someone who was lost. The water fills with small points of light moving slowly toward the sea.

Before you go, look once more at the dome. Notice how ordinary the city around it feels now — the office windows, the cyclists, the people eating lunch on benches by the river. Hiroshima was rebuilt, and life came back. The ruin stays still in the middle of it all. As you walk away, listen again to the river. It is the same water that ran here on that morning, and it runs on.