•pontydd cryf a thraphontydd dwr (i gario dwr yn bell);•bwâu crwn – a wnaeth eu hadeiladau’n gadarn ac a olygai eu bod yn para’n hir;•deunyddiau adeiladu newydd, fel sment a choncrit;•arfau newydd fel catapyltiau;•deddfau pwysig, y mae llawer o wledydd Ewropeaidd yn eu defnyddio o hyd;•yr iaith Ladin;•ysgrifenwyr mawr fel Cicero a Fyrsil.
•good, straight roads connecting all parts of the empire;•beautiful houses with courtyards and mosaic tiled floors;•strong bridges and aqueducts (for carrying water long distances);•round-topped arches – which made their buildings solid and long-lasting;•new building materials, such as cement and concrete;•new weapons such as catapults;•important laws, which many European countries still use today;•the Latin language;•great writers like Cicero and Virgil.