Claes Corneliszoon Moeyaert or Nicolaes Moyaert or Mooyaert (1592–1655) was an authoritative Catholic Dutch painter.
Moeyaert painted many biblical and mythological scenes, and also designed Amsterdam's triumphal arch for the arrival of Maria de Medici.
Moeyaert was a very rich man and had three children, two mentally challenged and cared for in his own home.
Moeyaert was for many years' commissioner of the Theatre of Van Campen, with Jan Vos.
Nicolaes Berchem, Salomon Koninck, Jacob van der Does and Jan Baptist Weenix were his pupils.