In Fez-Meknes the streets are as wide as a loaded mule
The old city of Fez was built between the 8th and the 14th centuries without counting on the wheel, and that fixed its width for good. It is reckoned to have some nine thousand alleys, it is considered the world's largest car-free urban area, and deliveries are still made on the back of an animal.
Almost every historic city you know has been reshaped by transport. Avenues were cut, corners straightened, half a block pulled down so a tram would fit. Fez did not go through that.
When the 20th century arrived, instead of opening up the old city another one was built beside it, and the old one kept exactly the width it had. That is why today you can read on the map a decision taken a thousand years ago.
01 Two cities on two banks
The site is a valley. The old city spreads along both sides of the Fez river, just before it joins a larger river to the northeast, and that hollow is the floor of the whole thing: from any high point, the city falls towards the water.
The founding dates from the late 8th century, and it was in fact two foundings. Two separate settlements were born, one on each bank, which grew on their own and did not merge into a single city until the 11th century. That scar is still there: the river is the seam.
Later, in the 13th century, a new administrative walled quarter was added alongside, and in the 20th an even larger modern city. The old one was wrapped and protected by that expansion, shut inside its wall and listed as world heritage since 1981.
02 The module is the animal
A city is built to the width its transport needs. Where there are carts, streets are sized so two can pass; where there are none, it is enough for whatever a load on an animal's back requires.
Here the second rule held for six centuries, and the module was fixed at something like a loaded animal plus just enough room for someone to walk beside it. Most alleys are reckoned not to reach three metres, and many are well under.
The whole is enormous for that scale: some three hundred hectares and, by the most quoted estimates, around nine thousand alleys. That combination of large area and minimum width is what makes the city physically and mathematically impassable for a car.
03 What goes up and what comes down
A city without vehicles is not a city without logistics. Everything that comes in and goes out (the fruit, the gas, the cement bags, the furniture, the rubbish) moves on the back of a mule or a donkey, or pushed in handcarts by two people.
That imposes a rhythm and a sound. The warning that a load is coming is not a horn: it is a short repeated shout telling you to move, and the sensible thing is to step into the first gap you find, because the mule will not brake for you.
It also imposes an economy. Moving goods costs time and arms, so the workshops and warehouses sit inside the fabric, not on an estate outside. The city manufactures where it lives because shifting things is expensive.
04 Streets that lead nowhere
The fabric is not a random maze, although it looks like one. It has two very different categories of street, and telling them apart completely changes the experience of walking inside.
The first are the commercial axes, which cross the enclosure from side to side. The main one runs down from the western gate to the centre and concentrates the souks, the workshops and the old merchants' inns. They are public streets in the full sense: you pass, you buy, you carry on.
The second are the neighbourhood lanes, which branch off those axes and almost always end in a dead end. They lead nowhere because they are not meant to lead anywhere: they are the antechamber of a cluster of houses. Walk into one by accident and you will most likely end up facing somebody's front door.
05 Where the wheels stop
The wall still surrounds almost the whole enclosure, and its gates work today not as defence but as a transport frontier. Outside there is a square, taxis, parked cars and vans unloading; inside, past the arch, none of that fits any more.
That line is the most interesting urban detail of the place. In a few metres you go from a city of engines to a city of feet, and everything coming in has to change its means of transport right there, on the threshold.
The river does something similar inside. It runs channelled through the centre, with houses built over it and short bridges crossing it, and it marks the low point of the valley. Anything you walk downhill eventually takes you to it.
06 How to travel it
The first useful rule is the slope. The old city sits in a valley, so downhill takes you towards the river and the centre, and uphill towards the walls. If you get lost, the tilt of the ground is a more reliable compass than the map on your phone.
The second is choosing your type of street. If you want to make progress, stay on the wide axes, which are full of trade and always come out somewhere. If you want to understand how people live here, turn into a neighbourhood lane and watch where it narrows: the width tells you whether you are still in public space or have walked into private.
And the third is a way of looking. When you pass a loaded mule and have to press yourself against the wall, measure by eye what is left over. That spare margin is, literally, the reason the city has this shape and no other.
