Chicago Architecture Practice Test - Prep, Study Guide & Practice Questions

The center of the Chicago grid map is located at Madison and State. This intersection is historically significant as it represents the starting point for Chicago's street numbering system. In 1909, the Plan of Chicago was developed to organize the city's layout, and the intersection of Madison Street and State Street was designated as the focal point for the city’s addressing and grid structure. Streets are numbered from this central point, with directions indicating whether they lie north or south of Madison and east or west of State. This strategic organization has influenced not just navigation but urban development and planning throughout Chicago's history.

The other intersections, while notable locations within the city, do not serve the same foundational role in the establishment of the city's grid system.