it always pained me to see zona colonial as it is now... similar project was undertaken in my city (work in progress). the center is filled with old maison. originally housing one family of rich merchants per floor they were adapted to house the poorest of the poor after the war, large apartments divided to house several families. the government has provided current tenants with brand new apartments, slightly out of the city. some at low interest (if anyone wanted to buy), some at low rent. the buildings were renovated and then rented/sold to individuals and businesses. restored to a former glory, if you may. and the previous owners came out well on the deal: sometimes there'd be few families living in the same apartment (parents and their kids with their partners/kids) and they received separate apartments.