Cecco d'Ascoli (1257 – September 26, 1327) is the popular name of Francesco degli Stabili (sometimes given as Francesco degli Stabili Cichus), an Italian encyclopaedist, physician and poet. Cecco (in Latin, Cichus) is the diminutive of Francesco, Ascoli was the place of his birth. The lunar crater Cichus is named after him. Source: Wikipedia (en)