Final answer:
The winning project by the Claude Vasconi and the Georges Pencreac'h in the 1970s was Les Halles, a major urban renewal project in Paris, France.
Step-by-step explanation:
The winning project by Claude Vasconi and Georges Pencreac'h in the 1970s was Les Halles. Les Halles was a major urban renewal project in Paris, France that aimed to transform the city's central market district into a modern commercial and cultural center.