Seine (department) replaced by Hauts-de-Seine
Dissolution
By 1968 it contained 5,700,754 residents (45% of them living in the City of Paris, 55% in the suburbs), making it by far the most populous department of France. It was considered that the Seine department was now too large to be governed effectively. On 1 January 1968, it was split into four smaller departments: Paris, Hauts-de-Seine, Seine-Saint-Denis and Val-de-Marne.  The latter three also include parts of the former Seine-et-Oise department, which was also abolished at the same time.
The breakup of the Seine department involved the following changes:
substituted by superseded by succeeded by followed by replaced with