São Jorge Castle

Start with the ground beneath you. The stones here are worn smooth, polished by centuries of boots, hooves and sandals. Under the pine trees the air is cooler, and it smells of resin and warm dust. Somewhere nearby a peacock calls out — a strange, sharp cry that surprises almost everyone. Then you reach the edge of the terrace, and the whole city of Lisbon opens up below you, with the wide river shining beyond the rooftops.

You are standing at São Jorge Castle, on the highest hill of old Lisbon. The castle sits in the parish of Santa Maria Maior, the historic heart of the city. From this hilltop, the people who held it could see ships arriving on the Tagus River long before they landed. That simple advantage, a clear view and a steep slope, explains almost everything about why this place matters.

People lived on this hill long before any castle stood here. Archaeologists have found traces of Iron Age settlement on the summit. Later came the Romans, and after them other peoples who held the Iberian Peninsula. Each group chose the same hilltop for the same reasons. It was easy to defend, and it watched over the river. So when you look at these walls, you are looking at the latest layer of a very old story.

The fortress you see grew mainly under Muslim rule. For several centuries, this part of Iberia was governed by Islamic dynasties, often called the Moors in European histories. They built strong walls here, around the eleventh century, to protect the governor's residence and the town. Inside the grounds, there is an archaeological area. There you can see the foundations of houses from that Islamic period, with the outlines of small rooms and courtyards still visible in the earth.

In 1147, everything changed. Afonso Henriques, the first king of Portugal, laid siege to Lisbon. He was helped by crusaders from northern Europe who had stopped on their way to the Holy Land. The siege lasted for months. When the city finally fell, the castle passed into Christian Portuguese hands. It would remain a royal stronghold for centuries.

There is a famous story from that siege, but it belongs to legend rather than verified history. Locals say a knight named Martim Moniz saw a castle gate beginning to close. He threw his own body into the gap so his comrades could force their way through. The tale says he died holding the door open. Whether it happened exactly that way, nobody can prove. But the name lives on. A square and a metro station in the city below carry his name today.

After the conquest, the hilltop became the home of kings. The royal palace stood inside these walls, and for a long time this was the centre of power in Portugal. Then, in the early sixteenth century, King Manuel the First moved the court down to a new palace beside the river. Trade and ships now mattered more than height and defence. Slowly, the old castle lost its royal role and became a quieter military site.

Here is a detail many visitors miss. The castle was not always named after Saint George. The dedication came in the late fourteenth century, under King João the First. Saint George was a warrior saint, and he was especially honoured in England. At that time Portugal and England had formed a close alliance, and the Portuguese king married an English princess. So the name above your head is partly a souvenir of an old friendship between two kingdoms.

In 1755, a massive earthquake struck Lisbon. It was followed by a tsunami and by fires that burned for days. Much of the city was destroyed, and the castle was badly damaged too. Look down at the flat, orderly streets of the Baixa district below. That neat grid was rebuilt after the disaster. The crooked lanes of Alfama, on the slope beside you, survived better. The contrast between them shows you where the earthquake hit hardest.

Now a second surprise. Much of what you see today is a restoration from the twentieth century. In the 1930s and 1940s, the Portuguese government rebuilt large parts of the castle. Later houses and additions were cleared away, and battlements were reconstructed to look medieval. Some historians criticise this work as more romantic than accurate. As you walk the walls, notice the difference between rough, older stonework and cleaner, more regular sections. You are reading two different centuries side by side.

Take time to climb the walls and towers. The walkways are narrow, and the steps are uneven, so move slowly. From the top, you can trace the curve of the river, the red roofs, the white church towers, and the long bridge to the west. Inside one of the towers there is a camera obscura. This is an old optical device that uses a lens and mirror to project a live image of the city onto a surface in a darkened room.

Back on the terrace, you will find old cannons lined up along the wall, pointing out over the rooftops. Nearby stands a bronze statue of Afonso Henriques, the king who took the castle. Families picnic in the shade, and the peacocks wander between the benches as if they own the place. In the late afternoon, the light turns gold, and the river becomes a sheet of bright metal. This is the hour when the terrace is at its busiest, and its warmest.

Before you leave, stand still for a moment at the wall. Listen to the city below — the rumble of a tram, a bell, voices carrying up the hill. Then look at the stones under your hand. They have watched this river for a very long time. As you walk down through the narrow streets of the Castelo neighbourhood, notice how the lanes still follow the line of the old walls, guiding you gently back into the city.