Henri IV's interest in urban planning should be seen in the light of his desire to reorganise the kingdom once peace had been restored. Concurrent with his agricultural reform efforts, the king wanted to breathe new life into France's cities by launching major urban policy projects, and embellish them by building public monuments.
Although he was a Gascon by birth, Henri IV was particularly interested in Paris. As early as 1590, he did not hesitate to say: "I love my city of Paris like my eldest daughter." In 1601, he announced a sort of programme for the capital city, in which he wanted to "spend the years […] and dwell there […]" and furthermore to "render this city beautiful and full of as many goods and ornaments as possible […]." Henri wanted to modernise Paris, stripping it of its medieval trappings by laying out roads and building new neighbourhoods. It should be pointed out that his Valois predecessors had started down this path, even though circumstances made it so that many of their projects were left unfinished.
This is particularly the case with the Pont Neuf, the first stones of which were laid under the reign of
Henri III
in 1578, and whose construction was halted in 1588. Henri IV, in letters patent dated 2 March 1598, decided
to "finish the Pont Neuf." By 1603, the work was well underway and Henri IV was able to cross the bridge
on foot. It took another three years for the bridge to be definitively completed (8 July 1606).
The final years of Henri's reign were marked by a whole series of projects, for which, nonetheless, there was no master plan.
In the winter of 1604–05, Henri IV conceived his first large-scale project. He wanted to create a square on the site of the park of the former Hôtel Royal des Tournelles. The building of the Place Royale (now the Place des Vosges) was launched by letters patent published in July 1605. They called for the construction of a vast, mostly enclosed square (135 x 140 metres) bordered by tall, identical townhouses.
The completion of the Pont Neuf opened the way to another urban planning project. The idea – given the bridge's location at the tip of the Ile de la Cité – was to link the new structure with the network of streets on either side of the Seine. The project called for creating two streets – quais, really – that would overhang the Seine on its north and south banks, and that would meet at the tip of the island at the level of the bridge. The triangular space thus created would be used for a new square, around which would be built houses of brick and stone, but they would be simpler and not as high as those on the Place Royale. Work on the Place Dauphine – named in honour of the Dauphin Louis, born in 1601 – began in 1607. Despite the difficulties associated with the massive earthworks that were required, the square was completed in only four years (1611). Like the Place Royale, Henri IV died before he was able to admire the result.
The Pont Neuf was well connected to the right bank, and on the left bank it ended at the kitchen gardens of the Augustinian convent. Concurrent with the construction of the Place Dauphine, Henri IV decided to build a monumental street that would extend the magnificence of the Pont Neuf. The ten-metre-wide Rue Dauphine led into the left bank towards the gate that led to the Faubourg Saint-Germain. The accompanying real estate transaction was so successful that Henri IV was overtaken by events. Every plot was sold and built on before the king could establish an architectural unity. His regret about this can be seen in a remark made in May 1607, when he said that it could have been "a handsome thing to see at the end of the bridge this street lined with similar facades."
The idea was not abandoned, and was taken up again for what can be considered to be Henri's final project. It was launched in 1608, and was even more ambitious. This time, the idea was to create an entirely new district in the Marais quarter, which at the time consisted of agricultural land located within the walls built by Charles IV. The king was clearly fond of both public squares and geometry; this time, he left aside the rectangle (Place Royale) and the triangle (Place Dauphine) in favour of the semi-circle. Flanked by homogenous townhouses, this amphitheatre-shaped space was to have been built at the corner of what are today the Rue Vieille-du-Temple and Rue de Turenne, up against the city walls. To symbolise the new union of his subjects under the aegis of their peacemaking sovereign, the streets that radiated outward from this new space would bear the names of French provinces. The "Place de France" did not survive the king's death, and was never built. Today, only the Rue de Normandie, Rue de Bretagne, Rue de Saintonge, Rue de Beauce, Rue de Picardie and the odd, arc-shaped Rue Debelleyme serve as reminders of Henri IV's final urban project.