The first phase of the expansion (c. 1661–1678) was designed and supervised by the architect Louis Le Vau. Initially he added two wings to the forecourt, one for servants quarters and kitchens, the other for stables. In 1668 he added three new wings built of stone, known as the "envelope", to the north, south and west (the garden side) of the original château. These buildings had nearly-flat roofs covered with lead. The king also commissioned the landscape designer André Le Nôtre to create the most magnificent gardens in Europe, embellished with fountains, statues, basins, canals, geometric flower beds and groves of trees. He also added two grottos in the Italian style and an immense orangerie to house fruit trees, as well as a zoo with a central pavilion for exotic animals. After Le Vau's death in 1670, the work was taken over and completed by his assistant François d'Orbay.