Self-jurisdiction was the essential point, and self-jurisdiction meant self-administration. But the commune was not simply an "autonomous" part of the State--such ambiguous words had not yet been invented by that time--it was a State in itself. It had the right of war and peace, of federation and alliance with its neighbours. It was sovereign in its own affairs, and mixed with no others. The supreme political power could be vested entirely in a democratic forum, as was the case in Pskov, whose vyeche sent and received ambassadors, concluded treaties, accepted and sent away princes, or went on without them for dozens of years; or it was vested in, or usurped by, an aristocracy of merchants or even nobles, as was the case in hundreds of Italian and middle European cities. The principle, nevertheless, remained the same: the city was a State and--what was perhaps still more remarkable--when the power in the city was usurped by an aristocracy of merchants or even nobles, the inner life of the city and the democratism of its daily life did not disappear: they depended but little upon what may be called the political form of the State. The secret of this seeming anomaly lies in the fact that a medieval city was not a centralized State. During the first centuries of its existence, the city hardly could be named a State as regards its interior organization, because the middle ages knew no more of the present centralization of functions than of the present territorial centralization. Each group had its share of sovereignty. The city was usually divided into four quarters, or into five to seven sections radiating from a centre, each quarter or section roughly corresponding to a certain trade or profession which prevailed in it, but nevertheless containing inhabitants of different social positions and occupations--nobles, merchants, artisans, or even half-serfs; and each section or quarter constituted a quite independent agglomeration. In Venice, each island was an independent political community. It had its own organized trades, its own commerce in salt, its own jurisdiction and administration, its own forum; and the nomination of a doge by the city changed nothing in the inner independence of the units.(42) In Cologne, we see the inhabitants divided into Geburschaften and Heimschaften (viciniae), i.e. neighbour guilds, which dated from the Franconian period. Each of them had its judge (Burrichter) and the usual twelve elected sentence-finders (Schoffen), its Vogt, and its greve or commander of the local militia.(43) The story of early London before the Conquest--Mr. Green says--is that "of a number of little groups scattered here and there over the area within the walls, each growing up with its own life and institutions, guilds, sokes, religious houses and the like, and only slowly drawing together into a municipal union."(44) And if we refer to the annals of the Russian cities, Novgorod and Pskov,