In the 1970s and 80s he increasingly emphasized his grid paintings based on number structures, which came to involve the Pascal triangle.

The Meyerhoffs have also given the gallery "Field No. 2" (1963), a classic grid painting by Agnes Martin.

For an artist widely admired for her monkish consistency, Ms. Martin's grid paintings are remarkably diverse.

Much better is his whimsical parody of an abstract grid painting made of colorful sponges glued together with black rubber.

An artist who has exhibited regularly in New York since the 1970's offers vibrant, syncopated grid paintings.

The price more than doubled the artist's previous record, $525,000 for "The Tree," a 1964 grid painting sold at Sotheby's in 1996.

The other part of the gift was a 1963 classic grid painting by Agnes Martin and a 1952 early Willem de Kooning charcoal.

Mr. Ellis's grid paintings are intelligent and sumptuous, if not very adventurous.

He also presents a nondescript grid painting made on a bedroom carpet.

Stephen Beal is an American artist recognized for his colorful grid paintings.