The colonial architecture of Indonesia refers to the buildings that were created across Indonesia during the Dutch colonial period, during that time, this region was known as the Dutch East Indies. These types of colonial era structures are more prevalent in Java and Sumatra, as those islands were considered more economically significant during the Dutch imperial period. As a result of this, there is a large number of well preserved colonial era buildings that are still densely concentrated within Indonesian cities in Java and Sumatra to this day.