In epigraphy, a multilingual inscription is an inscription that includes the same text in two or more languages. A bilingual is an inscription that includes the same text in two languages (or trilingual in the case of three languages, etc.). Multilingual inscriptions are important for the decipherment of ancient writing systems, and for the study of ancient languages with small or repetitive corpora. Important bilinguals include: the first known Sumerian-Akkadian bilingual tablet dating to the reign of Rimush, circa 2270 BCE. the Urra=hubullu tablets (c. 2nd millennium BCE; Babylon) in Sumerian and Akkadian; one tablet is a Sumerian-Hurrian bilingual glossary.