From The Guggenheim’s website, June 6, 2017, “This New Yorker Cartoon Documented the Guggenheim’s 1959 Opening” — read all about it here (Alan Dunn’s spread ran in the issue of November 28, 1959)
If you need more New Yorker cartoonists weighing in on the Guggenheim there’s always this collection from 2005 — The New Yorker Visits the Guggenheim. According to the publisher: “This book brings together five decades worth of cartoons and cover illustrations that feature the iconic museum, along with period photographs that reveal the artists’ inspirations.”
The Guggenheim has been on the cover of The New Yorker a number of times, including this beauty from Charles E. Martin (CEM) in January of 1970. 
Here’s Alan Dunn’s entry on the A-Z:
Alan Dunn (self portrait above from Meet the Artist) Born in Belmar, New Jersey, August 11, 1900, died in New York City, 1975. New Yorker work: 1926 – 1974 Key collections: Rejections (Knopf, 1931), Who’s Paying For This Cab? (Simon & Schuster, 1945), A Portfolio of Social Cartoons ( Simon & Schuster, 1968). One of the most published New Yorker cartoonists (1,906 cartoons) , Mr. Dunn was married to Mary Petty — together they lived and worked at 12 East 88th Street, where, according to the NYTs, Alan worked “seated in a small chair at a card table, drawing in charcoal and grease pencil.”
And here’s Charles E. Martin’s A-Z entry:
Charles E. Martin ( CEM) (photo left above from Think Small, a cartoon collection produced by Volkswagon. Photo right, courtesy of Roxie Munro) Born in Chelsie, Mass., 1910, died June 18, 1995, Portland, Maine. New Yorker work: 1938 – 1987.