Claim: Josip Bratulić is a Croatian philologist, he was born in Sveti Petar u Šumi and wrote a thesis on Croatian Glagolism which isthe oldest known Slavic alphabet.
Evidence: Josip Bratulić (born 2 February 1939) is a Croatian philologist and a historian of literature and culture. Born At the same university he received his master's degree and a doctorate, with a thesis on Croatian Glagolism. The Glagolitic script (/ˌɡlæɡəˈlɪtɪk/, Ⰳⰾⰰⰳⱁⰾⰹⱌⰰ Glagolitsa; Bulgarian: Глаголица Glagolitsa) is the oldest known Slavic alphabet.