Was fired after 16 years as a custom picture framer in Michigan. Had an excellent work record. I am 69 years of age and my replacement is 56.

Based on the limited information you provided, it sounds like there is a possibility of an age discrimination claim.  In order to pursue a claim of age discrimination you should first file a complaint with the EEOC or your state fair employment practices agency and give them an opportunity to investigate and make a determination.  If they cannot resolve the matter to your stisfaction, you will have the right to file a lawsuit after the EEOC investigation has been completed.