Leibniz had called the integral calculus calculus summatorius; in 1696 Leibniz and Johann Bernoulli agreed to call it calculus integralis. Jakob Bernoulli was struck by the way the equiangular spiral reproduces itself under a variety of transformations and asked, in imitation of Archimedes, that such a spiral be engraved on his tombstone, along with the inscription “Eadem mutata rasurgo” (“I shall arise the same, though changed”).