When the Goths, Longobards, and Carlovingians had conquered Italy, although most of the arts and sciences were lost or hidden in cloisters, neither trade nor commerce was quite neglected; but, despite the dangers from pirates, the ignorance of the sea, and the exactions of the lawless on land, the Adriatic and Mediterranean were timidly attempted by the inhabitants of the coast, while in the interior of the country an interchange of commodities was carried on between neighboring districts at places set apart for the purpose. These places were generally the large square or principal street of a town, or under the walls of a monastery, and the interchange took place on certain days appointed by public authority. The assemblies of the people were usually held on the Saturday, and were at first called markets; but afterwards the rarer and more important ones, which were held annually and for several consecutive days, were termed fairs, from the Latin word _feria_, because they always took place on the feast of some saint. Many rights and privileges were granted at an early period to the merchants who exhibited wares at these yearly gatherings; for without such inducements few cared to undertake a journey with a part, or perhaps the whole, of their earthly substance about them, along roads and across ferries beset by robber-nobles, who levied toll from passers-by and sometimes seized goods and persons for their own use. The Venetians began earlier to sail on distant seas, and maintained themselves longer on the water, than did the natives of any other parts of Italy. Cassiodorus represents them in the sixth century as occupied solely in salt-works, from which they derived their only profit; but in course of time they issued from their lagoons to become the most industrious and venturesome traffickers in the world. At the beginning of the ninth century they had already introduced into Italy some of the delicacies of the East, but drew odium on themselves for conniving with pirates and men-stealers to capture people and sell them into slavery in distant quarters of Europe and Asia. On the opposite shore of Italy the inhabitants of Amalfi showed themselves the most successful navigators during the early middle ages, trading with Sicily and Tarentum, and even with Egypt, Syria, and Constantinople. Their city is described by the poet-historian William of Apulia, in the eleventh century, as the great mart for Eastern goods, and the enterprise of its sailors as extending to all the ports of the Mediterranean. Flavio Gioja, a citizen of Amalfi, if he did not invent the mariner’s compass, as is somewhere asserted, certainly improved it about the year 1302, either by its mode of suspension or by the attachment of the card to the needle itself. This discovery gave such an impulse to navigation that what had been for ages hardly more than a skilful art became at once a science, and vessels no longer crept along the shore or slipped from island to island, but