CONSTANTINA, a province of Algiers, in the eastern or Levantine government. It is bounded on the east by Tunis, on the west by Tittery or Algiers Proper, on the south by the desert, and on the north by the Mediterranean. It is upwards of 230 miles in length and 100 in breadth. It is the most fertile, and every way the most improved, portion of Algiers. Its coast is the portion of Barbary with which Europeans have chiefly maintained a commercial intercourse.