Church of the Most Sacred Heart of Our Lord

Stand still for a moment and look at the wall in front of you. From a distance it looks dark, almost purple-brown. Come closer, and small pale stones appear scattered across the brick, like flecks of snow. Run your eye along the surface and the pattern repeats, row after row. The traffic of the square hums behind you, and trams pass on the street nearby. But the church in front of you feels quiet and heavy, almost like a ship at anchor.

This is the Church of the Most Sacred Heart of Our Lord, in the Prague district of Vinohrady. It stands on George of Poděbrady Square, a wide open space named after a fifteenth-century Czech king. Most visitors to Prague never come this far. They stay among the spires and baroque domes of the old centre. Here, a short metro ride away, the city shows a different face. It is calmer and more residential, and it is very much the twentieth century.

The church was built between 1928 and 1932. Its architect was Jože Plečnik, a Slovenian who worked for many years in Prague. That detail surprises many visitors. One of the city's boldest modern churches was designed by a foreigner. Plečnik was also trusted with Prague Castle. In the years after the First World War, he reworked its gardens, courtyards and rooms for the first president of independent Czechoslovakia, Tomáš Garrigue Masaryk.

Those years matter for understanding this building. Czechoslovakia was a new country, born in 1918 from the collapse of the Austro-Hungarian Empire. Prague was growing fast. New neighbourhoods like Vinohrady filled with apartment blocks, schools and shops, and they needed new parishes. Plečnik did not copy the Gothic or baroque churches of the past. Instead, he mixed ancient forms with modern materials and created something that belongs to no single style.

Look again at the facade. The dark clinker brick is a very hard, fired brick, and it covers most of the lower walls. The pale stones that stick out from it are granite. Many people read this pattern as a reference to ermine, the white fur with dark spots once used on royal robes. Whether or not Plečnik meant exactly that, the effect is rich and ceremonial. It is like a cloak thrown over the building.

Higher up, the materials change. The upper part of the walls is smooth and pale, finished in light plaster. Along the top, the building ends in a strong, simple cornice, like the edge of a classical temple. Plečnik admired the architecture of ancient Greece and Rome, and also of early Christian churches. You can see those influences here, simplified and stripped down. There are no flying buttresses and no pointed arches. There are only clean blocks and careful proportions.

Now turn your attention to the tower. It is not a slim spire. It is a broad, flat slab that rises almost as wide as the church itself. Two small pyramid-like points sit on its top corners. In the middle of the tower is an enormous round clock, made with a glass face. This is the first real surprise of the building. The clock is so large that from across the square it looks like a giant rose window.

The second surprise is hidden inside that tower. There are no ordinary staircases leading up. Instead, a gently sloping ramp winds upward through the tower, like a path inside a lighthouse. Visitors who climb it can reach the inside of the great clock, and look out through the glass over the rooftops of Vinohrady. Access to the tower is not always open, so it is worth asking on site if you would like to try it.

Step inside the church, and the noise of the square falls away. The interior is one large, open hall, with no rows of columns blocking the view. The walls repeat the brick and stone pattern of the outside, so the inside and outside feel like one continuous skin. Above you, a flat wooden ceiling is divided into deep square panels, known as coffers. The space feels wide and calm, more like an ancient basilica than a soaring cathedral.

Walk toward the altar and look up. Above it stand gilded statues of Czech patron saints, Saint Wenceslas among them, the tenth-century duke who is still the country's most beloved saint. Their gold surfaces catch the light against the darker walls. In the centre is a figure of Christ, the heart of the dedication. The arrangement is simple and symmetrical. Your eye is drawn straight down the hall to this single focal point.

Below your feet there is another world. The church has a crypt beneath the main hall, a low vaulted space that feels very different from the room above. Where the upper church is broad and bright, the crypt is close, quiet and intimate. It is often opened during guided visits. If you get the chance to go down, notice how the ceiling seems to press closer, and how sounds become softer.

Outside again, take a moment to see the church as part of its neighbourhood. The square around it is a real local space. People walk dogs, children run across the paving, and older residents sit on benches in the shade. On some days a farmers' market fills part of the square with stalls of bread, vegetables and cheese. The metro station opens almost at the church's feet, so a steady flow of commuters passes by.

Plečnik's church did not please everyone when it was new. Its mix of ancient and modern forms was unusual, and some found it strange. Today it is widely seen as one of the most important pieces of twentieth-century church architecture in the Czech lands. It shows that a sacred building did not have to look old to feel serious and dignified. It only had to be built with conviction.

Before you leave, walk slowly to the far side of the square and turn around. From there you can see the whole composition at once: the dark ermine walls, the pale band above, the wide tower and its great glass clock. Watch the hands move for a minute. Then, as you walk back toward the trams and cafés of Vinohrady, notice how often your eye returns to that round clock face, keeping time above the ordinary life of the neighbourhood.