Two of “The Faces of CRLS” from a City Hall exhibit by high school senior and photographer Nicolas Guevara. (Photo: Marc Levy)

A series of rich black-and-white portraits called “The Faces of CRLS” had an opening reception Tuesday at City Hall with the artist, high school senior and photographer Nicolas Guevara.

Guevara transferred to Cambridge Rindge & Latin from a private school in the city, Buckingham Browne & Nichols, which he’d attended since kindergarten.

A visit to the high school, though, showed what he was missing, Guevara said Tuesday at a School Committee meeting: diversity.

The high school’s 1,700 students and 400 district workers represent a staggering array of ethnicities and nationalities, and that beguiled him. “I was immediately struck with the total diversity. Everyone was different, from different countries to different languages,” Guevara said.

He transferred for his senior year, he said, and immediately set about taking portraits — first at one spot in a hallway, then wandering with camera in hand — seeking out some of the “iconic” faces showing the range of humanity at the school.

After visiting Mayor David Maher a couple of months ago to explain the project, an exhibit was arranged.

His portraits will stay up through Nov. 1 at City Hall, 795 Massachusetts Ave., Central Square. The artist’s website is nicolasguevara.com.