John Everett Benson, Who Chiseled John F. Kennedy’s Grave, Dies at 85

John Everett Benson, a master stone carver, designer and calligrapher whose chisel marked the deaths of presidents, playwrights, authors and artists, as well as generations of American families — and whose elegant inscriptions graced museums and universities, government buildings and houses of worship — died on Thursday in Newport, R.I. He was 85.

His son Christopher said he died in a hospital but did not specify the cause.

Mr. Benson practiced the ancient and exacting art of carving into rock; slate was his preferred medium. He did so, precisely and gorgeously, on cornerstones, gravestones and monuments, as his father had before him, working out of an atelier in Newport called the John Stevens Shop. Founded in 1705, it is one of the oldest continuously run businesses in the country.

The art Mr. Benson practiced is mostly devoted to mortality, the brief span of a life, though it is designed for eternity, or something close to it. It is often described as the slowest writing in the world. Mr. Benson could spend a day carving a cross; a gravestone might take three months.

For the inscriptions for the East Building of the National Gallery in Washington, designed by I.M. Pei in the 1970s, he averaged an hour and a half carving each letter, some of which are nearly a foot tall. He and his team at the time, two young carvers named John Hegnauer and Brooke Roberts, spent months completing the painstaking work.

He carved the words on the pedestal that supports Secretariat’s statue at Belmont Park; he also carved John D. Rockefeller Jr.’s credo into a slab of polished granite in Rockefeller Center. His elegant slate alphabet stone — alphabet stones are where lapidary artists show off their chops, their calligraphic feats and flourishes — lives in Harvard’s Houghton Library. He also worked on the National Cathedral in Washington, Yale University and the Boston Public Library, among other institutions.