Which architect is known for spearheading the City Beautiful movement with his designs?

Daniel Burnham is recognized for spearheading the City Beautiful movement, which emerged in the late 19th and early 20th centuries. This movement aimed at introducing beauty and grandeur into urban planning and architecture, advocating for designs that enriched the urban experience through aesthetic appeal and public spaces.

Burnham's contributions included the design of major urban plans such as the 1909 Plan of Chicago, which emphasized the importance of parks, wide boulevards, and harmonious architectural styles. His vision sought to create a more organized and beautiful city that enhanced civic pride and improved the quality of life for its inhabitants.

The City Beautiful movement is characterized by its ideals of incorporating classical architecture and planning principles to achieve order, beauty, and functionality in urban environments. Burnham's work effectively represented these ideals, making him a key figure in this historical movement and the correct answer to the question.