A relationship between the physical protuberances and the spiritual ones is attested by some famous and emblematic cases like Gian Battista Vico and Tommaso Campanella's autobiographies: the latter invented the nom de plume of Settimontano Squilla (Sevenmountain Rings), with which he signed his philosophical poems, playing on his surname and his seven bumps -- that, allegorizing, he described as the seven mounts or the seven pillars of the Wisdom rising prophetically on his head-universe. Like the philosophers, the artists too sometimes represent the aerial dynamism of their spirit through the image of a spiritual protuberance.