I was in Dresden in the 1990's and the city still had small sections of WW-II rubble, undergoing a second-wind type of restoration. Went back a few years ago, and the city has been completely restored. I think it took 50 years to complete. It is interesting when someone points out where the actual rebuilt sections are. However, I think some of the "restored" buildings are not faithful restorations, but simply something new on an old site.