 
Historical precis extracts from the manuscripts of Christian Pingeon
  In the Middle Ages up until 
    the end of the sixteenth century, the castle 
  inhabitants, along with some off their more familiar animals, occupied the 
  rooms. It was imperative that they be able to wash the floor with water. 
  This did not make parquetry a viable option. Furthermore, the large arched 
  rooms of the castles were generally of stone. 
The wood floors, then, were reserved 
  for estrades or footboards. These were 
  placed under the chairs of honor, under the beds, under the seats and the 
  tables of the winter feasts, or used to mark social status. They were often 
  
  covered with a shaggy carpet.
Then, gradually, terra cotta tiling 
  was used as flooring for the higher 
  levels of the homes. These floors were made up of juxtaposed boards with 
  sharp joints, or rabbets. The planks were 5 to 7 inches (1) wide and fixed 
  to the beams by forged nails.
It wasn't until the 16th and 17th 
  centuries that floors began to be 
  assembled with a tongue and groove configuration, with planks 3 to 4 inches 
  
  wide. Tongue and groove refers to a type of joint formed by fitting a tongue 
  
  on the edge of one board into a groove on another.
Around the beginning of seventeenth 
  century, there were two general ways of 
  positioning a parquet floor. They are as follows:
- Floors are formed of panels 5 to 6 feet long. A single plank is then
placed in the contrary direction (engraving Les vierges folles de le Blond
à Paris, 1640, British Museum).
- Hungarian point is made up of various planks of the same dimensions,
end cut at a 45-60 degree angle. The thickness is usually 22mm or 14mm.
Tongue and groove assembly is generally used for parquets nailed onto
backing strips.
In the seventeenth and eighteenth 
  centuries the apartment floors were made 
  of panels of square parquet flooring. The compartments were positioned 
  either complimentary to the square or in a diagonal formation, with or 
  without a plank.
Another technique often employed 
  with parquet flooring is marquetry, or 
  parquet floor in mosaic. Marquetry may be composed of star patterns, as with 
  
  the Château de Maisons located in Maison Laffite, near Paris. In this 
  castle 
  there remains a parquet floor of wood marquetry in report/ratio in the 
  Cabinet of the Mirrors. Parquet floors in mosaic continued gaining 
  popularity. In 1672, the Mercure Galant, a French gazette and literary 
  magazine founded by Jean Donneau de Visé in 1672, expressed popular opinion 
  
  by stating that people no longer wanted rugs, due to the amount of dirt they 
  
  collected, but rather parquet floors in various colors and styles.
Many recognized craftsmen have had 
  an impact on the evolution of parquet. 
  They have created new techniques, introduced new materials and made lasting 
  
  contributions to the history of parquet.
A prominent engraver in the first 
  part of the 17th century, Abraham Bosse 
  provides us with examples of taille-douce engraving, or copperplate 
  engraving. On an engraving of the King's room at Fontainebleau in 1645, 
  Bosse provides us with a parquet floor made up of floor squares and 
  decorated with report/ratio lily flowers.
While nothing remains of the invaluable 
  wood mosaics of Jean Macé, they 
  decorated the estradas and certain floors of the cabinets of the Louvre, the 
  
  cabinet of the Queen Mother in 1665, the cabinets of Tileries, 
  Saint-Germain, Fontainebleau and Versailles.
Andre-Charles Boulle was a cabinetmaker 
  for Louis XVI from 1642 - 1732. 
  Boulle began as a decorator and woodcarver at the Gobelins. A marquetry 
  technique popular in the 17th and 18th centuries, Boulle marquetry, would 
  come to bear his name. This technique utilized a brass veneer set in 
  tortoiseshell. He is most known for the marquetry floors in the Dauphin's 
  apartments at Versailles.
A former employee of Boulle, Pierre 
  Poitou, did the flooring of the Le 
  Cabinet des médailles, the medal cabinet, in 1685. He would eventually 
  
  become the King's marquetry craftsman in 1683. He specialized in marquetry 
  parquet, utilizing ebony and brass or ebony with brass and pewter.
Alexandre-Jean Oppenordt was a gifted 
  cabinetmaker employed by Louis XIV. He 
  is known for his hard stone or brass and tortoise shell marquetry furniture. 
  
  He is also known for his parquets and the work he did for La Petite Galerie 
  
  de Roi at Versailles palace. A portrait of the Grand Duché (cerca 1660) 
  in 
  Chantilly (Jones Collection, Victoria and Albert Museum - London) and other 
  
  rare drawings reveal the changeable iridescence of the work.
Geometrical drawings can add variety 
  to the flooring, as is the case with 
  the semicircle parquet floor in the Room of the Council at Fontainebleau, 
  decorated with a geometrical star pattern. Generally, the floors are waxed 
  and remain bare. There is a crew of workers dedicated to the maintenance of 
  
  these floors.
In the Choiseul Hotel in Paris, 
  there were parquet floors of wood mosaic in 
  report/ratio, similar to the mosaic seen on the gouaches of Henri Van 
  Blarenberghe (1734-1812) decorating the Choiseul Box. In the Hôtel de 
  
  Soubise, the oval living rooms had wood parquet floors in Versailles style. 
  
  Furthermore, it is known that workshops in the influential social circles of 
  
  Hache junior in Grenoble still produced sheets of parquet floors made up of 
  
  different woods near the end of the eighteenth century. The stages reserved 
  
  for services and the ground in the rooms and corridors are made of terra 
  cotta (tommettes) with six sides of four inches (10.8 cm) each. These are 
  cared for by waxing.
Thus, parquet is not only an artistic 
  expression of antique craftsmanship, 
  but also a practical and elegant addition to modern day homes. Its evolution 
  
  has lasted throughout the centuries and continues to this day. 
(1) 1 French inch = 27,0696 mm
  (2) 1 foot = 12 inches = 324,835 mm