Vienna imposes upon your eyes, a cityscape that weds beauty with a raw display of Enlightenment power. Its core architecture is all about the Hapsburgs, from the imposing buildings at the city center all the way out to the Schonbrunn Palace (see the photo), which is by far the most ostentatious private residence I can imagine. All to do with Austria's ruling family and their centuries-long display of manufactured majesty.
Vienna is a city, then, nested in cities, with a lengthy history of spilling over its walls, then rebuilding walls to accommodate its growth. What this did in Vienna was transform a central city into a kind of warren, where alleys that are more tunnels than alleys open into squares small or grand, ringed by Italianate buildings, magnificent ones from the 18th and 19th centuries side by side will more approximate ones—reconstructions from Vienna's post-WWII salvage, when the housing need was great and the finances strapped, and yet the city's mind, still deeply conservative as Vienna almost always is, tended toward facsimiles of the older structures that were still standing, distinguishable from the older counterparts by a kind of inattention to detail and nuance, settling for living spaces over architecture because they had to, because the finery of the old things didn't make sense like it used to.