The study of ancient inscriptions WordNet 3.0 & Open English WordNet

Epigraphy is the study of inscriptions, or epigraphs, as writing; it is the science of identifying graphemes, clarifying their meanings, classifying their uses according to dates and cultural contexts, and drawing conclusions about the writing and the writers. Wikipedia

Study of old inscriptions or epigraphs as writing Wikidata

The study of ancient inscriptions. OmegaWiki

The study or decipherment of inscriptions, especially of ancient ones. Wiktionary

Study of inscriptions. Wiktionary (translation)