Griffiths, PhillipPhillipGriffithsGreen, MarkMarkGreen2022-01-182022-01-182021https://hdl.handle.net/20.500.12111/7977To Herb Clemens. Lefschetz wrote that he put the harpoon of topology into the whale of algebraic geometry. Herb but the harpoon of topology into the whale of Hodge theory. Period mappings, or equivalently variations of Hodge structure, have been used both to study families of algebraic varieties and as a subject in its own right.en-USperiod mappingHodge theoryArticle