I came across this map of Vienna in 1769 (the city was then capital of the Hapsburg empire), i.e. almost a century after the major siege and battle of 1683 and almost a century before final removal of the city walls. It shows an inner district (perhaps a mile in diameter), surrounded by severe fortifications (the walls not round, but springing back-and-forth), followed by empty terrain perhaps a few hundred meters wide (obviously also an important means of defense), and then by an already dense ring of what may be called the suburbs.
My question is this: was this a typical layout for capital cities in the 18th century? E.g. would Paris, or for that matter Istanbul or Beijing have shown a similar overall layout (with local allowances for geography in the shape of rivers, etc.) and with similar maps available?