Until the first decade of the 20th century, much of North Trenton was made up of working farms, orchards, and large estates. After 1910, however, industrial development and population growth led to rapid development. By 1920, the North Ward was home to approximately a quarter of the city's population. North Trenton attracted a large middle-class, professional population, which coincided with the construction of modern, 'planned' neighborhoods situated around parks and green space. Several commercial districts, such as the Five Points (or Battle Monument Square), were established, and thrived from the 1920s to the 1960s. According to a New Jersey Historical Architecture survey, approximately seventy percent of all existing homes and buildings in North Trenton were constructed between 1919 and 1940.