Aran va Bidgol is a city and a county in Isfahan Province, on the central Iranian plateau, sitting just north-east of Kashan on the southern rim of the Maranjab desert and the great salt lake, Daryacheh-ye Namak. The name is a compound of two places: Aran and Bidgol were separate neighboring towns that grew into one another and were joined under a single municipality during the twentieth century, which is why the Persian form carries the conjunction va, the word for and, between them. The county takes in Noushabad and Abuzeidabad as well. This is desert country, and its weaving has always looked to Kashan.

Rugs from here are Kashan rugs in all but name. Kashan, a short distance to the south-west, has been the commercial center for everything woven in this corner of the province for centuries, and the hand-knottedSee in the carpet dictionary output of the surrounding towns has reached the market under the city's name. That is not a sleight of hand. The district shares one design vocabulary, one set of materials and one workshop culture. What belongs to the city alone are its famous signed ateliers and its court pedigree; what belongs to the whole district, Aran va Bidgol included, is the manner of weaving itself.

Weaving in the Kashan district goes back to Safavid times, when rulers of that dynasty kept vacation houses in Kashan itself and had rugs made for the royal household; Kashan is counted alongside Tabriz, HeratSee in the carpet dictionary and Kerman among the great producing centers of the period. The line was not unbroken, though. The industry behind the rugs sold today is a nineteenth-century revival, built under the Qajars as Persian carpets began flowing to Europe and America in quantity. In that commercial phase designing and weaving split into separate trades, and the district settled into the standardized, instantly recognizable patterns it still works with.

The design repertoire is narrow and formal, with far less variety than Tabriz offers. A central medallionSee in the carpet dictionary is the backbone, and the commonest layout sets that medallion against four corner piecesSee in the carpet dictionary repeating its color, so the composition reads as one thing rather than as parts. Shah AbbasiSee in the carpet dictionary patterning, the palmetteSee in the carpet dictionary-and-vine idiom named for Shah Abbas, runs through the field. Allover floral layouts without any medallion are equally at home here, and so are open-field designs, where a single medallion floats in generous empty ground, a layout the district shares with Tabriz, SaroukSee in the carpet dictionary, Hamadan and Kerman. Rarest is the darbari, or court type, woven with no border at all.

Size changes what you see. Large formats keep to the formal grammar: a piece of four by six meters will far more often be a medallion-and-corner designSee in the carpet dictionary, drawn for a grand room and worked on the loomSee in the carpet dictionary over years rather than months. Smaller rugs, around one and a half by two meters and under, are where the weavers take liberties, and it is in these that tree-of-life fields, vases and birds appear. If the unusual drawing is what appeals, look at the small sizes; if the classical statement is, look at the large ones.

Three colors dominate: deep red, navy blue and cream. Highlights range further, into lighter blues, beige, orange and yellow, but the structural colors stay constant. Yellow or green grounds exist and are genuinely uncommon. The look the district is known for is a contrast effect rather than a single hue: a light, often ivory field carrying the drawing, framed by a border in rich jewel tones, often a deep red thick with flowers, arabesques and vases between narrow guard stripes. On densely drawn floral work an ivory ground is both scarce and useful, since it lets the motifs read clearly instead of crowding.

One real change has happened over the generations, and it is a matter of color rather than technique. Older pieces run to deeper reds, burgundies and dark blues, while newer ones lean towards pastels and softer tones throughout. Age does some of this work on its own, because the vegetable dyes of antique weaving mellow with time, which is part of why old rugs read subtle where recent synthetic dyeing reads bright. Set the same drawing side by side in an old rug and a new one, and the old one will almost always be the quieter of the two.

PileSee in the carpet dictionary is normally all woolSee in the carpet dictionary. In the district's best-known period the classic choice was a fine merino imported through Manchester, and the trade still uses the name Manchester Kashan for that group of rugs, valued for luster and for the way the wool takes dye. Beneath the pile sits a cotton foundation, which is what keeps a large rug flat and square. Silk turns up, but as an old trait rather than a new one: current production is cotton foundation with wool pile, while silk-and-wool pieces, and the rare all-silk ones, belong among the antiques, where a silk-and-wool pile usually sits on a silk foundationSee in the carpet dictionary too.

Knot densitySee in the carpet dictionary here is best understood as sufficient rather than extreme. Antique pieces of this district have been counted at roughly 240, 256 and 324 knots per square inch (KPSI), and the one at the bottom of that spread is a first-rate rug whose drawing reads perfectly clearly. DensitySee in the carpet dictionary matters because the drawing is curvilinear: with too few knots a flowing arabesqueSee in the carpet dictionary turns blurry. Past the point where the curves resolve cleanly, a higher count buys very little, and design, symmetry, materials, color, age and condition all weigh as heavily. To count for yourself, measure an inch across and an inch down, multiply, then average two or three places, since floral passages run denser than open ground.

Underfoot the pile sits at medium height, close to Tabriz, without the deep, heavy surface that HerizSee in the carpet dictionary, Mashad and Sarouk weaving is chosen for in hard-worn rooms. That middle weight is part of why these rugs last. Pieces from the district that are eighty, a hundred, even a hundred and ten years old remain in service and structurally sound, and antique silk pile, where you meet it, is notably supple under the hand. A rug built this way is meant to be walked on, and a century of ordinary use is a normal outcome rather than a remarkable one.

Signed rugs are part of this tradition, although the famous names, MohtashamSee in the carpet dictionary and Dabir among them, were city ateliers rather than workshops of the outlying towns; a signature woven into a rug claims a particular workshop's authorship, not the district's. What the district as a whole earned is a durable place in the market. Kashan work is often ranked just behind Tabriz in popularity among Persian rugs, and it stays on the short list, with Tabriz, Sarouk and Mashad, for formal floral medallionSee in the carpet dictionary and allover designs in large sizes. A rug woven in Aran va Bidgol belongs to that tradition, made where the desert begins rather than in the city that named it.

A Persian rug is an Iranian rug — a rug hand-knottedSee in the carpet dictionary in Iran — and the tradition behind it is the oldest documented anywhere. The earliest surviving carpet, the Pazyryk rugSee in the carpet dictionary, was found preserved in a frozen burial mound and dates to the fifth century BC — roughly 2,500 years ago — and it is already accomplished work, not a beginner's craft. What began as warm, hard-wearing floor coverings for tribal households grew, over those centuries, into the art form that every other rug-weaving country has borrowed from.

Two later chapters shaped what a Persian carpet looks like today. Under the Safavid dynastySee in the carpet dictionary, from 1501 to 1732, the court promoted weaving alongside painting and calligraphy, and the workshops of Tabriz, HeratSee in the carpet dictionary, Kashan and Kerman produced the masterpieces that now sit in museums. This is when the great central medallionSee in the carpet dictionary appeared, and when designs grew elaborate enough that a separate designer — often a miniature painter — drew the pattern onto a cartoon for the weaver to follow. The second chapter came in the nineteenth century, under the Qajar dynastySee in the carpet dictionary, when production reached its historical peak, exports to Europe and America boomed, and the workshop industry whose descendants still weave today took its modern shape.

The trade sorts Persian rugs into three families. City rugs — Tabriz, Kashan, Kerman, Nain, Isfahan — are woven in workshops from a drawn design, carry the highest knot densities and come in the widest range of colors, sizes and patterns. Village rugs such as HerizSee in the carpet dictionary, BakhtiariSee in the carpet dictionary and KarajaSee in the carpet dictionary sit in between, mostly geometric and largely woven from memory. Tribal rugs — Baluch, TurkomanSee in the carpet dictionary, QashqaiSee in the carpet dictionary, each named after the people who weave it — are made on small portable looms, so they run smaller, and their bold geometric drawing comes from the weaver's own head rather than from paper.

The design vocabulary draws on a deep stock of motifs: Shah AbbasiSee in the carpet dictionary palmettes, flowing arabesques, the small repeating Herati patternSee in the carpet dictionary, medallions, garden and tree-of-life compositions. These combine with regional habits into styles a practiced eye can place at a glance, from the bold geometric medallions of Heriz to the fine curvilinear florals of Isfahan.

The classic palette is built on natural dyes: madderSee in the carpet dictionary reds, indigo blues, saffron yellows and the soft whites of undyed woolSee in the carpet dictionary, settled into combinations refined over centuries. Natural dyes age gracefully, mellowing into the patina that older rugs are prized for, and slight shifts of tone between dye batchesSee in the carpet dictionary — the effect called abrashSee in the carpet dictionary — are a mark of small-batch natural dyeing, not a flaw.

The pileSee in the carpet dictionary is almost always woolSee in the carpet dictionary, and in a Persian wool rug the wool itself decides much of the quality. The best fleece comes from high-altitude flocks, where it grows thicker and richer in natural oils; spring-sheared wool beats the autumn clip, and hand-spun yarnSee in the carpet dictionary gives a finer, softer thread than machine spinning. Fine pieces add silk highlights to a wool pile, and at the very top sits the Persian silk rug, woven in pure silk. Foundations are usually cotton in city weaving, wool in tribal and older pieces, silk at the very top of the range.

Every knot is tied by hand, one at a time, in one of two forms: the asymmetric Persian knotSee in the carpet dictionary, usual in central and eastern Iran, or the symmetric Turkish knotSee in the carpet dictionary, common in the north-west ever since Seljuk weavers introduced it in the eleventh and twelfth centuries. A large rug holds in the region of two million knots and can occupy a weaver for about a year.

Knot densitySee in the carpet dictionary is the figure newcomers fixate on, and the finest silk-foundation pieces do reach as much as 1,000 knots per square inch. But densitySee in the carpet dictionary only matters as far as the drawing demands it: a curvilinear Isfahan needs a fine weave to stay sharp, while a geometric Heriz is famously durable at a modest count. Material, symmetry, color harmony and condition say more about quality than any single number.

Persian carpets settle into modern rooms as naturally as classical ones, as a focal point in a living room, a foundation under a dining table or a quieter accent in a bedroom. Care is undemanding: gentle vacuuming without a rotating brush, an occasional turn for even wear, and a professional wash about every five years — sooner in a hallway or entrance, less often in a quiet room.

A hand-knotted Persian rug tends to outlast its owners. Pieces a century old regularly survive in fine condition, their colors settled and their pile supple, often looking better than when they left the loomSee in the carpet dictionary. A well-chosen, well-kept rug holds its worth and passes down as a family heirloom rather than being replaced — which is precisely what the knots, the wool and the dyes were always for.