THE MEDIEVAL CITY
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Chester and York, and, in more fragmentary fashion, at Norwich, Exeter,
London, Winchester, Chichester, and elsewhere. In continental Europe
there are many examples of a more or less complete circuit of walls: in
France at Aigues Mortes and Avignon, in Spain at Avila, and in Germany
at Nuremberg and many small towns in Swabia. Fortified gates have sur-
vived more frequently, perhaps because they could offer some kind of ac-
commodation and serve also for the control of admission to the town and
the collection of market tolls. Many of the smaller towns of continental
Europe still retain traces of their walls, and they survive almost intact in
some of the hill-towns of Italy.
Streets may not have been structures, but they were an essential fea-
ture of the urban scene. Streets of former Roman towns had once been
paved with stone sets, slabs, and cobbles, and, where they have in recent
times been excavated, they are often seen to have been worn into grooves
by the wheels of carts and wagons. The streets of medieval towns sadly
fell far short of the standards set by the Romans. They were not always
paved, though occasionally one finds in medieval records a note of the
payment for some kind of stone surface. Most of them, however, were at
best given an occasional dressing of sand or ash. They were usually made
to slope, not, as is the practice today, toward a gutter on each side, but
toward the middle. Water was thus kept away from the buildings which
lined the streets on each side. In this way, after heavy rain a street might
be turned into a miniature watercourse. Nor was there any sidewalk;
pedestrians could only keep as far as possible from the middle of the road,
but were always liable to be splashed by the passage of animals and ve-
hicles. Conditions were made worse by the widespread practice of dis-
posing of household waste by throwing it into the street, where it was
collected at irregular intervals by so-called rakers and disposed of in that
receptacle for all waste materials—the river.
Except in southern Europe and the Mediterranean region, most towns
had been built on the banks of a river. Whether the towns had originated
at crossing points, where merchants and travelers gathered, or whether
the crossing was established for the convenience of the town may remain
uncertain. In any case, few towns did not possess a river bridge, which
was usually built and maintained by the city authorities. Some river cross-
ings had earned an almost legendary fame, as, for instance, London
Bridge, now dismembered and re-erected across a dry river-bed in Ari-
zona, and that built across the Tiber during the early days of Rome. A