Not everyone liked the skywalks, which connect buildings Mr. Franzen designed at Hunter College on Lexington Avenue. Neighbors lamented the loss of sunlight. But Mr. Franzen, a Modernist subscriber to the form-follows-function credo, considered them the functional equivalent of ivy-covered walkways for urban students. It would “become the college community’s main street,” he wrote of the skywalk plan in 1972 in the college’s student newspaper, “well above rush-hour traffic at street level.” — nytimes.com