 From this vantage point he could supervise the construction of Grant Park, which he designed as part of the Plan of Chicago, and its structures including Buckingham Fountain and the original Peristyle in today's Millennium Park.His son E. H. Bennett Jr. later occupied this same office through the late-1960s.Bennett's firm was a pioneer in the creation of zoning ordinances and the study of transportation and regional planning as urban design tools.