Augustinus Rotundus (Polish: Augustyn Rotundus, Lithuanian: Augustinas Rotundas, 1520–1582) was a Christian and Renaissance humanist, erudite, jurist, political writer, first historian and apologist of Lithuania. Rotundus was vogt of Vilnius, general secretary to the Grand Duke and King Sigismund Augustus and elder of Stakliškės. After his nobilitation to the szlachta, Rotundus adopted surname Mieleski, or Milewski.[1]