The "belly of Paris," as the old market district of Les Halles was long known, has had many looks in its eight centuries. Everyone agreed, however, that its last makeover in the 1970's was a disaster. Now, after months of deliberation, the mayor of Paris has chosen a French architect, David Mangin, to oversee a fresh attempt to rescue the 15-acre zone. In doing so Wednesday, Mayor Bertrand Delanoë acted cautiously. Of four competing proposals, Mr. Mangin's design was the least radical, focusing on Les Halles' place in the landscape of central Paris more than on sculptural innovation. Further, instead of adopting Mr. Mangin's plan to renovate a huge underground mall and transportation hub known as the Forum des Halles, Mr. Delanoë called for a new design competition for the Forum.
