Pin #6) This cat structure is a good example of an environment with both curvilinear and rectilinear shapes. The variety of lines and shapes allow the cats to have a wide range of play space. To me, the rectilinear lines represent a space for the cats to sit and the curvilinear lines make challenging obstacles for the cats.
Windsor Castle, parts of which date back to the 11th century, is a royal residence at Windsor in the English county of Berkshire. The castle is notable for its long association with the British royal family and for its architecture. The original castle was built after the Norman invasion by William the Conqueror