 Alexander the Great is considered the second richest person to ever live. By the age of 30, he had created one of the largest empires in history, stretching from Greece to northwestern India. He was undefeated in battle and is widely considered to be one of history's greatest and most successful military commanders. At his peak, Alexander the Great conquered and owned over 10 million square miles, or around 2.6 billion hectares of land spread across Asia and Europe. The value of land owned by Alexander the Great is estimated to be over 20 trillion dollars. Alexander also conquered mineral rich lands in Egypt and Iran that had enormous amounts of precious metals. Alexander the Great's net worth adjusted for the present day would be around 32 trillion dollars. Click on the link below to see the full video.