Humanist designs vary more than gothic or geometric designs. Some humanist designs have stroke modulation (strokes that clearly vary in width along their line) or alternating thick and thin strokes. These include most popularly Hermann Zapf's Optima (1958), a typeface expressly designed to be suitable for both display and body text. Some humanist designs may be more geometric, as in Gill Sans and Johnston (especially their capitals), which like Roman capitals are often based on perfect squares, half-squares and circles, with considerable variation in width. These somewhat architectural designs may feel too stiff for body text. Others such as Syntax, Goudy Sans and Sassoon Sans more resemble handwriting, serif fonts or calligraphy.