This four-volume set investigates the architectural evolution and regional diversity of the built environment across the United States. The author, Scott Eckert Gebhard, compiles extensive documentation to provide a comprehensive survey of significant structures, ranging from colonial foundations to modern developments. The work serves as a systematic framework for understanding how geography, culture, and historical shifts have shaped the physical landscape of the nation.

Experts and architectural historians frequently cite this set as a foundational reference for regional studies. The prose is noted for its academic density and focus on technical precision, making it a standard resource for researchers and students of American history.