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Constantin A. Crețulescu or Kretzulescu (22 May 1809 in Bucharest – 21 March 1884 in Bucharest) was a Romanian academic, politician, and honorary member of the Romanian Academy from 1871. He served as Prime Minister of Romania and Minister of Justice from 1 March 1867 until 4 August 1867.
He was the brother of Nicolae Crețulescu.