In this interior design example, two columns help define a room which would otherwise appear too open and exposed to the hall space.
In this example, a single column allows to set apart a dining room space.
In this music room the main purpose of columns is to go with the theme of classical art and music:
Note the changing light as you go from area to area, even though the columns are identical. It creates an interesting effect and expands the space.
The columns define the room. They may also conceal a large unattractive wall in the back.
Trees and tree trunks were the original inspiration for architectural columns. This design brings us back to the basics, so to speak. If the columns are load-bearing, this allows to distribute the weight more evenly.