Dhaka made the world's finest cloth and nobody knows how to weave it.

01 A cloth worth more than gold

By the late eighteenth century Dhaka was known for producing a muslin described as the finest cloth ever woven by human hand. That was not commercial exaggeration: it was a cotton so light and so sheer that contemporary descriptions read like invention, and its trade drove the economy of the whole region.

That craft went extinct. It did not transform or modernise: it disappeared, along with its looms, its particular cotton and the knowledge of the weavers who made it. Today nobody can reproduce that muslin, and attempts to recover it are research projects, not workshop practice.

02 What survived

What does remain alive is jamdani, that muslin's close relative: a fine, sheer patterned cotton woven by hand on a loom by craftspeople and apprentices around Dhaka. In 2013 UNESCO inscribed it on the Representative List of the Intangible Cultural Heritage of Humanity.

It is worth looking closely at how it is made, because it explains why the technique is so fragile. The motifs are not printed or embroidered afterwards: they are inserted by hand, thread by thread, with a point, while the cloth is being woven. No mechanism automates it. The design exists in the head of the person weaving and is lost with them.

03 The fort that was never finished

The other piece to walk is Lalbagh Fort, and its story fits the rest of the city: it was never finished either. Work began in 1678 under prince Muhammad Azam and stopped when he was recalled to Delhi. His successor did not continue it.

The reason handed down is domestic and out of all proportion: in 1684 Pari Bibi, the governor's daughter, died there, and from then on he considered the enclosure ill-omened and left it as it was. It has stayed that way for three and a half centuries: a set of separate pieces —a pavilion, some gates, a tomb— inside an enclosure that was never closed.

There is a detail almost nobody looks at that says more than the domes: the drainage system cut into the ground. In a city where nearly two thousand millimetres of rain fall a year, concentrated into four months, getting water out was not a secondary technical matter. It was the condition for anything else to exist.

04 The river still does the work

The cloth left by river, and the river is still there doing exactly the same with other goods. The Buriganga, on the southern edge of the old city, is still the river port through which a substantial share of what the city consumes arrives and departs, in wooden boats worked by oar and engine.

Going down to that bank is the best half hour you can spend in the city, and it asks nothing of you but to look. The density of river traffic, the scale of unloading by hand and the continuous noise explain at once why a city sits where it sits and still works for the same reasons four centuries later.

05 What Dhaka leaves you

What stays with you is not a building. It is awareness of a specific, documented loss: something the whole world wanted was made here, and nobody knows how to make it any more. It was not destroyed in a war or burnt in a fire; it stopped being handed on, which is a far quieter way of disappearing.

And the image of the hands at the loom stays, which is where the city still has something to lose. Jamdani lives because somebody is still teaching it, and that is the entire difference between the two cloths in this article.