There are a number of examples of this architectural style, but much better preserved, along the side streets near the Ayasofya (Hagia Sophia). That said...I'm

There are a number of examples of this architectural style, but much better preserved, along the side streets near the Ayasofya (Hagia Sophia). That said...I'm honestly not the least bit surprised that many of these places are falling into disrepair. At the same time, I wouldn't ascribe it to gentrification or any ill will by the middle class, looking to replace them with new construction, toward immigrants too poor to maintain them. This is just how Istanbul is. The city is so old that there's not really any point in placing special value on something that might be merely one or two (or even three) hundred years old. It's not that Istanbul is in any hurry to tear down old construction. The city is just ruthlessly pragmatic. The product of millennia of settlement built upon settlement built upon settlement...it really is unlike quite any other place in the world.