A unique thing is the existence of another plaza, the Plaza Burgos, which is immediately beside the St. Paul’s Cathedral. After the first tier emanating from Plaza Salcedo are the houses of prominent residents that now make up the preserved heritage houses of Vigan. This urban plan remained relatively in tact despite wars and calamities that have been endured by Vigan since its foundation. The major changes to the original urban landscape were caused by fires. The Casa Real was replaced with a provincial capitol building during the American period when the original structure burned down.