Trinity Cathedral, Saint Petersburg

Look up. Against the pale northern sky, five domes rise above the rooftops, painted a deep, saturated blue and scattered with golden stars. On a grey afternoon, that blue seems to hold its own light. Around you, trams rattle along the avenue, and the air carries the damp, mineral smell of a city built on water. This is the Holy Trinity Cathedral of the Izmailovsky Regiment. Many locals simply call it Trinity-Izmailovsky. It is one of the largest Orthodox churches in Saint Petersburg, and one of the most unusual to look at.

Start with the colour, because almost everyone does. Blue domes with gold stars are rare in this city of gilded spires. In Orthodox tradition, blue is often linked to heaven and to the Mother of God. The stars turn each dome into a small night sky. Against the white walls and the white columns below, the effect is clean and calm. It feels less like a palace and more like a lantern placed at the edge of the old centre.

The name tells you who built this church, and why. The Izmailovsky Regiment was one of the old Life Guards regiments of the Russian Empire, the elite units that guarded the emperor. In the eighteenth century, the regiment was given land in this part of the city. Its soldiers lived here in long streets of barracks. A church was the heart of any regimental quarter. It was the place for oaths, for weddings, for funerals, and for blessing the colours before war.

The first church on this site was wooden. Wooden churches were common in early Saint Petersburg, but they aged quickly in the wet climate. By the early nineteenth century, the old building was in poor condition. The decision was made to replace it with something permanent in stone. The commission went to Vasily Stasov, one of the leading architects of the age. Construction began in the late 1820s, and the new cathedral was consecrated in the mid-1830s.

Stasov worked in the Empire style. That is the Russian form of Neoclassicism, the strict, column-heavy style inspired by ancient Greece and Rome. Walk around the building and you will see the plan. It is shaped like a Greek cross, with four arms of equal length. Each arm ends in a portico of tall columns under a triangular pediment. So the cathedral has no single back side. It presents a formal face to every direction, like a temple standing at a crossroads.

Now look at how the five domes are arranged. One large central dome sits in the middle, with four smaller domes at the corners. This five-dome layout is a very old Russian pattern. It is often read as Christ surrounded by the four Evangelists, the authors of the Gospels. Here, Stasov placed that ancient Russian form on top of a building that is otherwise classical. Russian tradition above, Greek and Roman order below. That mix is the quiet surprise of this cathedral.

Step inside, if the doors are open. After the noise of the avenue, the space feels very tall and very white. Light falls from the windows of the drum, the round base below the main dome. Your eyes are pulled upward almost at once. The interior is bright rather than dark and candle-heavy, which surprises many visitors used to older Orthodox churches. Listen for the soft scrape of shoes on stone, and the murmur of people lighting thin wax candles.

Here is a detail many visitors miss. In February 1867, the writer Fyodor Dostoevsky was married in this cathedral. His bride was Anna Snitkina. She had worked as his stenographer, taking down his novel The Gambler at great speed so he could meet a harsh deadline. Their partnership became one of the steadiest of his life. She later managed his publishing and his money. The wedding took place here, under these domes, in a parish not far from where the writer lived.

The twentieth century was hard on this building. After the 1917 revolution, the Soviet state pursued an anti-religious policy across the country. Thousands of churches were closed, stripped, or destroyed. Trinity Cathedral was closed in the late 1930s. Its interior was emptied, and the building was used as a warehouse. For decades, the great white structure stood in the city without its original purpose. It survived, but much of what had been inside it did not.

In 1990, near the end of the Soviet period, the cathedral was returned to the Orthodox Church. Services resumed, and restoration work began. Then came a second shock. In August 2006, a fire broke out in the scaffolding around the main dome. The dome burned, and its framework collapsed in front of watching crowds. Many people in the city saw the smoke. The repair took several years. The blue dome you see today is the restored version.

Before you leave the square, look for the tall column nearby. It is a monument to military glory, first raised in the late nineteenth century after the Russo-Turkish War of the 1870s. Its body was made from captured Turkish cannons. The Soviet authorities removed the original column. A new version was installed in the early 2000s. So the monument has the same story as the cathedral beside it. Built, lost, and brought back by a later generation.

The streets around you still carry the memory of the regiment. The numbered streets nearby, known as the Izmailovsky Rotas, take their name from the companies of soldiers who once lived along them. Today they are ordinary residential streets of apartment blocks, cafés, and courtyards. But their straight, even lines still follow the old military plan. Walk one of them, and you are walking the grid of a soldiers' town. The cathedral was always meant to be its centre.

Take a final look at the domes before you move on. Notice how the gold stars catch even a weak sun, and how the white columns turn faintly grey or pink as the light changes. Behind you, a tram passes. Someone crosses the square with shopping bags. People have stood on this spot for nearly two hundred years and looked up at the same blue. The building has been a church, a warehouse, and a ruin after fire. Today, it is simply here, and so are you.