Origins
5
pire. The city replaced the hillfort. It was, as a general rule, carefully
planned with straight streets intersecting at right-angles. Generous space
was allowed for temples and basilicas or large halls, which served as pub-
lic meeting places, for the forum, or central square, around which these
buildings were grouped, and for the theater, where dramatic shows were
performed, and the amphitheater or arena, where more brutal games were
staged.
The peace, which the might of Rome had ensured, made it unneces-
sary at first to build defensive walls around cities. But late in the third
century this began to change. Groups of barbarians broke across the
Roman frontier along the rivers Rhine and Danube and threatened cities
in the west and south of Europe. Walls were hastily built. Archaeology
has shown how temples and similar buildings were raided for stone, so
urgent was the need for protection. All towns of any importance came
to be walled; nevertheless, most continued for a century and more to be
centers of social and economic activity. Few were actually deserted, if
only because their walls, towers, and fortified gates offered some protec-
tion against invaders. But their days were numbered. Their wealth, which
had allowed and encouraged the construction of their monumental struc-
tures, was dependent on the peaceful exchange of goods and services be-
tween town and country, province and province. This interchange was
the first victim of insecurity and war, and the decline of the Roman Em-
pire was marked by the contraction, even the abandonment, of cities.
The North African Moors, a Berber people under Arab leadership,
perpetuated urban life in those parts of Spain they invaded and settled.
The Moors also preserved elements of Greek and Roman civilization and
maintained and even enlarged some of the cities the Romans had estab-
lished, such as Cordoba and Seville. This was not the norm, however;
other invaders were Germans from central Europe, Vikings and
Varangians from northern Europe, Slavs from eastern Europe, and Tur-
kic peoples from Asia. Most of these invading peoples had been accus-
tomed to living in small village communities and to packing up their
possessions at intervals and moving to new sites, where they cultivated
virgin land for a period before moving on again. They showed little in-
clination to settle in towns which the Romans had built, and, if they did
not destroy them, they at least allowed them to fall to ruin. Crafts, which
had been prosperous in an urban environment, decayed after their urban
settings had fallen to ruin. Some former Roman towns disappeared, and