(La). The sand-pits. So the Tuileries were called to the fourteenth century. Towards the end of that century tiles were made there, but the sand-pits were first called the Tile-works or Tuileries in 1416. At the beginning of the sixteenth century, Nicolas de Neuville built a house in the vicinity, which he called the “Hotel des Tuileries.” This property was purchased in 1518 by Francois I. for his mother.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894