BEST KNOWN FOR: 

First European to discover the southern tip of Africa, later named the Cape of Good Hope. Europe now knew it was possible to get to Asia by sailing south around Africa. 

ONE POSSIBLE WAY TO REMEMBER THIS FEAT BEING TIED TO HIM: 

The initials of Bartolomeu Dias are B.D.

Discovering that there was a passage to India and Asia by sailing south from Europe was a very BIG DEAL. You no longer had to travel there across land, which was a dangerous and long journey.

The letters in Big Deal are B.D.

Bartolomeu Dias (BD) had a journey that was a very Big Deal (BD)

BD = BD