The Wealth of Nations by Part 2 Chapter 3 Page 19

and the employment of this capital is the cause of the industry of those two cities. In the other parliament towns of France, very little more capital seems to be employed than what is necessary for supplying their own consumption; that is, little more than the smallest capital which can be employed in them.

The same thing may be said of Paris, Madrid, and Vienna. Of those three cities, Paris is by far the most industrious; but Paris itself is the principal market of all the manufactures established at Paris, and its own consumption is the principal object of all the trade which it carries on. London, Lisbon, and Copenhagen, are, perhaps, the only three cities in Europe which are both the constant residence of a court, and can at the same time be considered as trading cities, or as cities which trade not only for their