 In "Ramayana", there are mentions of "Suvarnabhumi" (Land of Gold) and "Suvarnadvipa" (the Golden Island or Peninsula, where "dvipa" might refer to either a peninsula or an island) Greek knowledge of lands further to their east improved after the conquests of Alexander the Great, but specific references to places in South East Asia did not appear until after the rise of the Roman Empire.Greek and Roman geographers Eratosthenes, Dionysius Periegetes, and Pomponius Mela had written about a Golden Isle ("Khrysē", "Chryse Insula"), which some in modern times argued to mean Sumatra while excluding the Malay Peninsula.Pliny in "Natural History", however, referred to "Chryse" as both a promontory and an island.