an old is not the same as freezing it.
A district with no new building slowly becomes a museum.
Rules that ban all change also ban the repair that keeps a house standing.
Owners who may not anything simply let the roof go.
Better protects the street rather than every brick.
Height, width and are fixed; the inside is left free.
A shop can become a workshop without anyone needing permission.
Cities that took this approach kept both the buildings and the residents.
Where rules were stricter, the buildings survived and the people left.
Funding matters as much as the rule book.
A for a roof is cheaper than rebuilding after a collapse.
that nobody can afford to maintain does not last.