That "trick" can be offset by requiring that all historic buildings should be extensively photographed, especially the details of their architecture, and floor plans drawn up and have them stored at the ayuntamiento. There they should be digitized and stored digitally as back up.
Then a new law should be put in effect that requires that in case of an intentional, unintentional destruction or if the destruction is the product of an act of God (storms), the replacement building (or maybe just the facade in unimportant historic buildings, but buildings that were the setting of an important historic act or the home of a patriot, then it should apply to the whole building) should look identical to the original historic building.
Not only should this discourage such "trick" from happening again, but it will help preserve the traditional character of every Dominican historic districts.