Continuation of the palace history :
With the transfer of goods from the Temple order to the Hospital , the royal Treasure kept previously in the Paris Temple is transported in 1317 to the Louvre. The Louvre is extended by Charles V.
See also: Louvre’s medieval castle.
Becoming obsolete, the big tower is destroyed by François 1st in 1528 and in 1546 begins the stronghold transformation in to luxurious royal residence. These works are lead by Pierre Lescot and continue during the reign of Henri II and Charles IX. Then two new wings are attached to the building.
In 1594, Henri IV decides to combine the Louvre’s palace to the Tuileries Palace constructed by Catherine de Medicis: it is the" Grand Design", whose the first step is the Big Gallery.
The Square Court is built by the architects Lemercier then Le Vau during the reign of Louis XIII and Louis XIV, quadrupling the size of the former Renaissance court. Then the palace’s decoration and planning are supervised by architects as Poussin, Romanelli and The Brun. But all this is interrupted brutally when Louis XIV chooses Versailless as a the power centre and royal residence in 1678. The Louvre remains a long time just as it is. It is only in the XVIII Th century that new projects Lead, notably by Gabriel and Soufflot, in the aim to continuation the" Big design".

From palace to museum :
Among these new projects, the idea to transform the Louvre into a museum is brought in to being during the reign of Louis XV. It will succeed during the Revolution.