Richard Marsina (4 May 1923, Šahy, Czechoslovakia) is a Slovak historian, one of the founders of modern Slovak histography and a prominent expert on the medieval history of Slovakia. His scientific activities include research and publication of medieval sources, research of the oldest settlements in Slovakia, medieval towns, the history of Great Moravia, the Christianisation of Slovakia and of the Kingdom of Hungary and the oldest history of the Bishopric of Nitra. He worked in leading position at various scientific institutions like the Institute of History of the Slovak Academy of Sciences (SAS), the Slovak Society for History, the Scientific Board for Historical Sciences, Trnava University in Trnava, the Department of History at Matica slovenská and others. In the 1960s, he also worked