Church of the Gesù, Palermo

Push through the heavy door and the air changes at once. It is cooler in here, and quieter, and it carries a faint smell of old stone and candle wax. Then your eyes adjust to the low light, and you see it. Every pillar, every wall, every chapel is covered in coloured marble. Reds, greens, ochres and creams are cut and fitted together like the pieces of a giant puzzle. Take a slow breath. This is the Church of the Gesù.

Locals often call it Casa Professa, after the Jesuit house that stands beside it. The Jesuits were a Catholic religious order founded in the sixteenth century. They became known as teachers, preachers and missionaries. The order reached Palermo around the middle of that century, and this became their first great church in Sicily. Building began in the second half of the sixteenth century. Work went on for decades, and the church changed shape as it grew.

From outside, you might not expect much. The façade is fairly sober, and the church sits among tight streets in the old district of Albergheria. This is one of the oldest quarters of Palermo. Laundry hangs from balconies here, scooters squeeze past, and the market of Ballarò is only a short walk away. That contrast is part of the experience. You come in from narrow, noisy lanes, and suddenly you are inside one of the most decorated rooms on the island.

So what exactly are you looking at? The technique has an Italian name, marmi mischi, which means mixed marbles. Craftsmen cut thin slices of stone in many colours. Then they set them into a marble background, piece by piece, to form patterns and pictures. A related style, called tramischi, layers the stone into even more complex designs. Sicilian workshops developed this craft to a very high level in the seventeenth and eighteenth centuries. Palermo has several fine examples, but few churches use it as completely as this one.

Walk closer to one of the side chapels and look carefully. From a distance, the walls read as rich colour. Up close, they become a world of small images. You will find twisting vines and leaves, bunches of fruit, and baskets of flowers. You will see birds and small animals tucked into the borders. Chubby cherubs peek out between the scrolls. Every one of these figures is made from stone, not paint. Think of the hours of cutting and polishing behind a single bird.

Above the marble, the decoration continues in white and gold. Bright stucco figures stand along the walls and around the arches. Stucco is a fine plaster that sculptors shape while it is still soft. Here it forms angels, garlands and allegorical figures — human figures that represent ideas such as faith or charity. Palermo became famous for its stucco artists in this period. Their work brings a lightness to the room that balances the heavy, polished stone below.

Why so much decoration? This was the age of the Counter-Reformation. The Catholic Church was answering the Protestant movement across Europe. One answer was to make churches into places of wonder. The Jesuits were especially good at this. They believed beauty could move people emotionally, and through emotion lead them to faith. A visitor in the seventeenth century, perhaps a farmer or a fisherman, would have walked in and felt surrounded by heaven itself. That was the plan.

Here is something many visitors miss. Much of what you see is not entirely original. During the Second World War, Palermo was heavily bombed, and in 1943 this church was badly hit. Parts of the roof and the dome collapsed. Frescoes on the vault were lost. After the war, restorers spent many years repairing the building. They saved and refitted large areas of marble. Look up at the ceiling, and remember that some of its painted surface was rebuilt after that destruction.

As you look at the vault, notice the difference in texture between the ceiling and the walls. The walls hold their colour in the stone itself, so the marble survived better than paint. This is one reason the lower parts of the church feel so intact. In some places, a careful eye can pick out areas of repair, where tones look slightly fresher. These are not flaws. They are part of the building's story, a record of a city that chose to rebuild what it had nearly lost.

The Jesuits did not stay forever. In the eighteenth century, rulers across Catholic Europe turned against the order. In the 1760s, the Jesuits were expelled from the Kingdom of Naples and Sicily, and their property passed to the state. Later the order returned. The large house next door, the Casa Professa itself, went on to new uses. Today it holds Palermo's municipal library. So the complex still serves learning, just as the Jesuits once intended.

Now find a quiet spot near the centre of the nave and simply listen. Footsteps echo softly off the marble floor. Voices drop to a whisper without anyone asking. Light from the windows falls in long bands across the pillars, and the polished stone catches it. As the sun moves, different colours seem to wake up. A green that looked dark ten minutes ago may now glow. The room is never quite the same twice.

If you have time, walk around the whole church slowly, chapel by chapel. Each one has its own character and colour scheme. Some lean toward deep red stone, others toward softer creams and yellows. Compare the altars and the designs set into their fronts. You may notice that the same craftsmen's habits repeat — a certain curl of leaf, a certain shape of shell. It is a little like recognising handwriting. These workshops left their signatures in stone.

Remember, too, that this is a working church. People still come here to pray, to light candles, and to attend Mass. You may see an older woman sitting quietly in a pew, or a family stepping in for a moment of calm. Their presence is a reminder that this room was never built only for admiration. It was built for use, for ritual, for the ordinary rhythm of a neighbourhood. Moving softly here is a sign of respect.

Before you leave, stop once more at the door and turn around. Take in the whole room — the marble, the stucco, the gold, the light. Then step back out into the streets of Albergheria. Notice how the noise returns, the smell of frying food from nearby stalls, the chipped plaster on the old houses. Inside and outside belong to the same city. Carry that contrast with you as you walk on, toward the market or the next church.