Karel van Mander (I) or Carel van Mander I (May 1548 – 2 September 1606) was a Flemish painter, poet, art historian and art theoretician, who established himself in the Dutch Republic in the latter part of his life. He is mainly remembered as a biographer of Early Netherlandish painters and Northern Renaissance artists in his Schilder-boeck. As an artist and art theoretician he played a significant role in the spread and development of Northern Mannerism in the Dutch Republic.