[Advice Needed: Is it too late to pursue further education in Art History?]

I graduated thirteen years ago with a BFA in Art History. My other concentration was in Communication Design. Afterwards, I worked as a graphic designer for six years and became a exhibiting oil painter. I completed a Masters degree in Art Education and worked in the public school sector for another six years. The economy, lack of jobs and generally not knowing what I wanted to pursue played a part in these decisions. Now I have come to the conclusion that I would like to revisit the art history field again and pursue further education. Is it too late considering that I worked in fields other than art history and I have been out of academia for awhile?

My situation is similar to yours