Final answer:
Douglas Cardinal was the first architect to introduce Indigenous architecture, which incorporates traditional design principles, materials, and construction techniques of indigenous cultures.
Step-by-step explanation:
Douglas Cardinal was the first architect to introduce Indigenous architecture. Indigenous architecture is a style of architecture that incorporates traditional design principles, materials, and construction techniques of indigenous cultures. It often reflects the cultural identity and values of the indigenous community it represents. For example, in his design for the Canadian Museum of History, Cardinal incorporated elements inspired by the longhouses of the Haudenosaunee people.