The study of ancient inscriptions and letter forms on buildings, statuary, tablets, and other durable materials and objects (such as wood, bone, pottery, stone). An expert in such studies is an epigrapher or epigraphist. Such texts are often the only surviving records of extinct cultures and chronicle ancient events, beliefs, and lists of kings. Epigraphy encompasses inscriptions from the earliest complex societies to those of modern states. Epigraphy sometimes does not include the study of texts painted on ceramics or written on papyrus or wood, which are regarded as within the studies of ceramics and papyrology, respectively. Epigraphy deals both with the form of the inscriptions, and with their content: study of the form enables assessment of the development of language and the alphabet; their content is, however, usually more important for the light thrown on the social, political, religious, and economic life of the ancient world. The science includes decipherment, translation, explanation, and evaluation of the inscriptions.