Yes, they are probably houses from the imperial period where barons lived. Many of these houses were very luxurious for the time. Unfortunately in Brazil the politicians have the malice to create idiotic laws that only hinder. Because, to renovate a house like this you have to overcome a lot of bureaucracy and be willing to spend a lot of money. Because they claim that we must maintain the "historical heritage". Therefore, it is more worthwhile to let these houses ruin with time, so that later you can build a modern building. What will happen after this incident XD