Po-i-Kalyan

Stand still for a moment and look down. The square under your feet is paved in pale, sun-warmed brick, the same honey colour as almost everything around you. Now let your eyes travel upward... and keep going. A single tower of baked brick rises above the rooftops of Bukhara. In the afternoon light it looks less like a building and more like woven cloth.

This is Po-i-Kalyan, a name usually translated as "at the foot of the Great One." The great one is the minaret above you. Around its base sit three buildings that frame this square: the minaret, a vast congregational mosque, and a working religious school. Together they form the spiritual heart of the old city. For centuries, this is where Bukhara came to pray.

Begin with the tower. The Kalyan Minaret was completed in 1127, under a ruler of the Karakhanid dynasty, a Turkic house that governed this region in the early Middle Ages. It rises about forty-five metres. For many centuries it was among the tallest structures in Central Asia. A minaret was built for the call to prayer. But a tower this tall also worked as a landmark for anyone walking toward the city.

Look closely at the surface. There is no paint, and almost no tile. The entire decoration comes from the brick itself. Builders set the bricks at angles, in diagonals, zigzags and diamond patterns. Each band around the shaft carries a different design. As the sun moves across the sky, the shadows change, and the patterns seem to shift with them. This is the first thing most visitors miss — the tower looks different at every hour.

Now find the narrow band of blue near the top. Those turquoise glazed tiles are a small detail on such a large tower. Yet they are among the earliest known uses of blue glaze in this part of the world. Over the following centuries, that colour would spread across the domes and gateways of Samarkand, Bukhara and beyond. Here, high above the square, is one of its first appearances.

The tower carries several stories, and not all of them are history. The most famous one involves Genghis Khan. When the Mongol armies took Bukhara in 1220, they destroyed much of the city. Legend has it that the conqueror stood beneath this tower, looked up, and his hat fell from his head. He bent to pick it up — and, so the tale goes, decided that a tower which made him bow should be spared. Historians cannot confirm the story. What is certain is that the minaret survived.

Another name for the tower is darker. Locals sometimes call it the Tower of Death. According to popular tradition, condemned criminals were thrown from the top in earlier centuries. Accounts of this practice are hard to verify, and guides tell it in many versions. It is best treated as part of the city's folklore. Still, it reminds us that this tower served more than one purpose in the life of Bukhara.

Turn now to the long building on one side of the square. This is the Kalyan Mosque, the city's great Friday mosque, where the whole community gathered for the main weekly prayer. The present building dates from the early sixteenth century, the time of the Shaybanids, a dynasty that ruled from Bukhara. It stands on the site of earlier mosques. Its courtyard is enormous — large enough for thousands of worshippers to kneel together in rows.

If you step inside the courtyard, notice the change in sound. The noise of the square drops away. Arched galleries run around all four sides, repeating like a slow drumbeat. At the far end, a tall gateway leads to the main prayer hall, crowned by a turquoise dome. In the open space, a small pavilion stands alone on the brick. Look back the way you came, and the minaret rises above the courtyard wall, perfectly placed.

Across the square from the mosque stands the Mir-i-Arab Madrasa, a school of Islamic learning. It was built in the 1530s. Its name refers to a religious teacher from Yemen, known as Mir-i-Arab, who was an influential figure at the Bukhara court. Look at its two blue domes, one on each side of the main entrance. Together with the mosque opposite, they create a mirror across the square. Architects in Central Asia often designed buildings in facing pairs like this.

Here is the second surprise. During the Soviet period, when religious schools across the region were closed, Mir-i-Arab was allowed to stay open. For decades it was one of the very few places in the Soviet Union where young men could formally train as imams. It still operates as a madrasa today. That is why visitors usually cannot walk through its inner courtyard. You can admire the entrance portal, and perhaps glimpse students passing through the gate.

The square around you has changed over the centuries, but its rhythm has not changed much. In the morning, the light is soft and the brick looks almost pink. By midday it turns pale and hard. In the evening, the walls glow orange, and the tiles on the domes seem to deepen in colour. Families stroll across the paving, children chase pigeons, and vendors in nearby lanes lay out embroidered textiles and ceramics.

Before you leave, stand once more at the foot of the tower. Put your hand on the brick if you can reach it. Nearly nine centuries of sun and wind have passed across this surface. Armies came and went, dynasties rose and fell, and the call to prayer kept sounding from this square. As you walk away down the narrow streets, turn around now and then. For a long way, the minaret will still be there above the rooftops — showing you the way back, just as it did for travellers long ago.