Khoy sits on the plain north-west of Lake Urmia in West Azerbaijan province, in the far north-western corner of Iran, well beyond Tabriz on the way to the Turkish frontier. Medieval Arabic and Persian geographers already record it under the name Khuy as a walled trading town on the caravan road that ran from Tabriz towards Maku and on into eastern Anatolia, and that road explains the place: woolSee in the carpet dictionary, goods and people moved through it for centuries. The town and its surrounding villages are largely Azerbaijani Turkic-speaking, with Kurdish communities in the outlying districts. Weaving here belongs to the wider Azerbaijan tradition of north-western Iran rather than to any one workshop or master.

That tradition is a village one, and the distinction matters when you are looking at a rug. Azerbaijan weaving is grouped with HerizSee in the carpet dictionary, KarajaSee in the carpet dictionary and Abadeh as village work, not with the city workshops of Tabriz or Isfahan, and not with the nomadic tribal weaves either. The work is not driven by a designer's cartoon in a commercial atelier. The looms stand in houses, the weavers are the families who live in them, and the rugs carry the small irregularities that follow from that: a border that adjusts itself around a corner, a motif that shifts scale as the field runs on.

Work follows the seasons in this part of Iran, where the winters are long and severe. In spring and autumn the men shear and prepare the wool while the women gather the materials used to dye it. When the cold closes in, the loomSee in the carpet dictionary goes up inside the house and the whole family weaves through the winter, the weaving itself usually described as the women's work. It is a household economy rather than a trade carried on in a separate building, and the rhythm of the year, rather than a production schedule, decides how much comes off the loom.

No paper design lies behind these rugs. Patterns pass from one generation to the next by memory, and each new generation puts something of its own character into what it inherited. The practical consequence is worth understanding before you buy: two Azerbaijan rugs of the same type will be recognisably the same family and will not be the same rug. Spacing varies, the number of repeats varies, secondary motifs come and go. If you need two matching pieces for a symmetrical room, this is not the weave to look in; if you want a floor that looks made rather than printed, it is.

The design vocabulary is geometric first. Fields are built on angular armatures, and where flowers and curved forms appear they are worked inside that geometry rather than replacing it. Three layouts recur. A repeating medallionSee in the carpet dictionary, with two or more medallions running down the field instead of a single one at the center, is common and suits long formats where one central medallion would simply be lost. An all-over geometric field, with shapes repeating continuously from edge to edge, is the second. The third, seen especially in the runners, is the botehSee in the carpet dictionary, the teardrop figure most European buyers know under the name paisley.

Color runs dark and warm. Grounds are typically deep navy blue or a deep red, with the lighter work carried by the accents: cream above all, then orange, green, yellow and paler blues. Undyed natural wool tones appear in their own right, especially in runners, so a beige or soft brown in a field may be the color of the fleece rather than a dye at all. Traditionally the dyes are vegetable, made from material gathered locally in spring. Seen in a room, the effect is a rug that anchors and darkens a floor rather than lifting it.

Wool from this region carries a long-standing reputation, and it rests on the ground it comes from: Iranian Azerbaijan has some of the best sheep pasture and mountain grazing in the country, and the fleece taken off it is of high quality and notably hard-wearing. Construction is normally a cotton foundation with a wool pileSee in the carpet dictionary, the cotton giving a stable, flat-lying structure that holds its shape under the weight of a deep pile. All-wool foundations also occur in the region, and a rug built that way feels a little softer and more flexible in the hand.

Knotting follows the symmetric, or Turkish, knot. It is usually traced into Persian weaving with the Seljuk Turks in the eleventh and twelfth centuries, and its influence remains strongest in exactly this corner of the country, along with Tabriz and Hamadan. For what these rugs are, it is the practical choice. The symmetric knot grips both warps, which gives strong resistance to wear; it renders straight lines and angles cleanly, which suits a geometric design; and it leaves an even, balanced pile surface. Knot densitySee in the carpet dictionary in the region runs at roughly 120 to 160 knots per square inch (KPSI), good for village weaving and well below workshop levels.

Pile is thick. Rugs from this region belong to the high-pile group with Heriz, BijarSee in the carpet dictionary, Hamadan and SaroukSee in the carpet dictionary, and the depth is the point rather than a by-product: a deep, densely packed pile absorbs foot traffic for decades and is slow to show a path. Hallways, entrance halls, living rooms and workrooms are where such a rug earns its keep. The same thickness makes it a poor choice where a door has to clear the floor by a few millimeters, so check the swing of the door before committing to one in a doorway.

Format is where the region has a genuine specialty. Azerbaijan is one of a small group of weaves, with Heriz, Hamadan and Malayer, that regularly produced wide runners, and older pieces in particular tend to come over 90 cm across rather than in the usual narrow gallery width. For a broad hallway, or a long room where a standard runner would look mean, that extra width is hard to find elsewhere. Smaller geometric rugs come off these looms too. Genuinely room-sized carpets are less characteristic; a loom set up in a family house imposes its own limits.

Finished rugs from the region are carried to the bazaar in Tabriz and sold into that market, which is why a rug woven in a village near Khoy may reach a buyer under the name of the city it passed through. Because they last, pieces turn up readily in both antique and semi-antique condition, and an older rug is a normal thing to find here rather than a rarity. One that has worn evenly, with the pile low but sound and the ends and sides intact, is often a better rug than a newer example of comparable grade.

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.