It's being called the biggest trade deal since the World Trade Organisation formed, covering one-point-two billion people.
Rwandan President Paul Kagame says the deal shows Africa is getting closer to what it should be.
The African Continental Free Trade Area, or AfCFTA will account for over $3.4 trillion in GDP.
Cyril Ramaphosa was there, attending his first ever African Union meeting as the new President of South Africa, but did not change the Republic's decision to opt out of the agreement.