French settlers further added their influence on the colony by constructing buildings in the form of Beaux-Arts and added French-influenced landmarks such as the Hanoi Opera House (modeled on the Palais Garnier), the Hanoi St. Joseph's Cathedral (resembling the Notre Dame de Paris) and the Saigon Notre-Dame Basilica. The French colonists also built a number of cities and towns in Indochina which served various purposes from trading outposts to resort towns. The most notable examples include Sa Pa in northern Vietnam, Đà Lạt in central Vietnam and Pakse in Laos.