One of the main features of Costa's plan was that he presented a new city with its future shape and patterns evident from the beginning. This meant that the original plan included paving streets that were not immediately put into use; the advantage of this was that the original plan is hard to undo because he provided for an entire street network, but on the other hand, is difficult to adapt and mold to other circumstances in the future. In addition, there has been controversy with the monumental aspect of Lúcio Costa's Plan, because it appeared to some as 19th century city planning, not modern 20th century in urbanism.