Are you talking about some kind of pillars, or ??? How wide are they? Are then floor-to-ceiling? Painted to match surroundings? Hollow (tap them)? Where are the exactly in relation to doors, etc?

Pilaster?

http://en.wikipedia.org/wiki/Pilaster

they are about 4 inches tall and in every corner of the house,yes they are decorative.They are at bottom not up top in walls.

Wooden corner protectors?

The ones at the doorway - if the door casing/trim comes down to meet them - are probably plinth blocks.

For example:
{{!gwi}}

(A pilaster is typically the decorative panel that comes up out of the plinth block.)

The ones in the corner are usually just called "inside corner trim blocks", like this:

My stepdad (a contractor, old-house-sympathetic-but-not-obsessive) also called them "corner soldiers", but I don't know how widespread that is.

LOL, I used them when I put up molding in a house I just sold. They're great ways to get out of mitering corners. I called them cheaters.