Most of the city 's monumental structures in the historic center were built in the first decades of the 20th century .
There are a number of significant large homes near this same area built in the 1960s in Art Deco style such as the La Portaviandas building .
Most of the city 's monumental structures in the historic center were built in the first decades of the 20th century , although there are a number of significant large homes near this same area built in the 1960s in Art Deco style such as the La Portaviandas building .