the Middle Ages the name of Saint Landri, this bishop
having had an oratory, and perhaps his residence, in the neighborhood.
Under the Later Empire, in the reign of Posthumus, the northern suburb
having increased in size and importance, a market was placed at the
Champeaux, on the site of the present Halles Centrales, and the port of
the Greve became, as it has remained ever since, a point of landing for
merchandise coming from the upper Seine. The port on the southern side
of the river, near the great road from Genabum, was established on the
site of the mediaeval _Quai de la Tournelle_, the great tower which
replaced that of the southern wall of fortification of the city built by
Philippe-Auguste. This quai still serves at the present day as a
landing-place for the barges.

[Illustration: FLIGHT OF LEUDASTE, A MEROVINGIAN. From a drawing by Jean
Paul Laurens]

In the reigns of Louis the Fat and Louis VII, the successors of the
_Nautae Parisiaci_ were known as _mercatores aquae parisiaci_, and they
were the origin of the municipal body charged with the policing of the
river navigation and commerce. Later in the Middle Ages, this small
species of Hanseatic League had a commercial station at
Marsons-sur-Seine, and its maritime jurisdiction extended as far as the
city of Mantes, situated on the western limits of the territory of the
Parisii. The sources of the Seine, near the farm of the Vergerots in the
commune of Saint-Germain-la-Feuille, were held in great veneration in
Gallo-Roman times, and a temple, the remains of which have been found,
was erected in their honor. In 1867 the Municipal Council of Paris set
up a monument "to the sources of the river which has given its name to
the department of the Seine, and to which Paris owes its ancient
prosperity."

The overrunning of Gaul by the barbarians, the latest historians tell
us, did not present the imposing spectacle of a great invasion in which
armed hosts of valiant and robust warriors trod down the effeminate and
corrupted civilization of the Romans, pillaged and ravaged the seats of
refinement and luxury in city and country, slew and carried into
captivity without respect for age or sex.

Long before the invasions of the fifth century the Germans had been
established in the empire, both as colonists and as soldiers. The
legions composed of Germans are said to have been even more amenable to
discipline than the Roman ones. The first who established themselves i