Further design changes were made during the summer of 1579. First, the number of arches was changed from eight and four to seven and five. This was not a problem on the north side, where nothing had been built, but on the south, where the four piles and the abutment on the Left Bank were already laid, the addition of the fifth arch necessitated reducing the length of the platform on the island, the "terre-plein", from 28.5 toises to about 19. Second, it was decided to allow houses to be built on the bridge (though they never were). This required the widening of the bridge. The remaining piers were built over the next nine years. After a long delay beginning in 1588, due to political unrest and to the Wars of Religion, construction was resumed in 1599 under the reign of Henry IV. The bridge was opened to traffic in 1604 and completed in July 1606. It was inaugurated by Henry IV in 1607.