or Lou·is·burg (lo͞oˈĭs-bûrgˌ)
A town of Nova Scotia, Canada, on eastern Cape Breton Island. It is near the site of the fortress of Louisbourg, built c. 1712-1740 by the French to guard the entrance to the Gulf of St. Lawrence. In 1758 the fort fell to a British land and sea attack, which reduced it to rubble. A national historical park here includes reconstructed portions of the complex.