Bernard Frénicle de Bessy (about 1605–1675), was a French mathematician. He was born in Paris. He wrote many papers about mathematics, number theory and combinatorics. The Frénicle standard form, a standard representation of magic squares, is named after him. He solved many problems created by Fermat. He also discovered a taxicab number and in 1693, he described all 880 essentially different normal magic squares of order 4.