Adam Gdacius or Gdacjusz or Gdak, also called Rey of Silesia (1615 – 1688) was a Polish-language writer and a Lutheran pastor at the Wilna church[1] He was born and died in the Silesian town of Kreuzburg (now Kluczbork), where from 1644 was a deacon and, later, a parish priest.
He wrote sermons and moralizing literature in Polish and Latin, mainly in the years 1674–1687.