<Table> <Tr> <Th> Name </Th> <Th> Photograph / Portrait </Th> <Th> Lifetime </Th> <Th> Description </Th> </Tr> <Tr> <Td> Musa I of Mali </Td> <Td> </Td> <Td> c. 1280--c. 1337 </Td> <Td> Mansa Musa, or Musa I of Mali is considered one of the richest men in history . Musa was the tenth emperor of the Mali Empire, one of the prosperous Sahelian kingdoms that developed along the Saharan slave trade routes in the later medieval period . Mansa Musa made his fortune by exploiting his country's salt and gold production . Musa is said to have brought several tonnes of gold to Mecca when he made a pilgrimage there in 1324 . Reported as being inconceivably rich by contemporaries, "There's really no way to put an accurate number on his wealth ." </Td> </Tr> <Tr> <Td> William the Conqueror </Td> <Td> </Td> <Td> d . 1087 </Td> <Td> William the Conqueror became personally enormously wealthy from spoils of war during the Norman Conquest of England . </Td> </Tr> <Tr> <Td> Basil II </Td> <Td> </Td> <Td> 958--1025 </Td> <Td> Byzantine emperor from 960 to 1025 at the time of the Eastern Roman Empire's greatest medieval territorial extent, also a time of considerable prosperity for the Empire . </Td> </Tr> <Tr> <Td> Alan Rufus </Td> <Td> </Td> <Td> c. 1040--1093 </Td> <Td> Alan Rufus, 1st Lord of Richmond, was a relative and companion of William the Conqueror (Duke William II of Normandy) during the Norman Conquest of England . By 1086 he had become one of the richest and most powerful men of England . </Td> </Tr> <Tr> <Td> William de Warenne, 1st Earl of Surrey </Td> <Td> </Td> <Td> d . 1088 </Td> <Td> Fought alongside William the Conqueror at the Battle of Hastings and was rewarded with considerable land holdings in England . </Td> </Tr> <Tr> <Td> Richard FitzAlan, 10th Earl of Arundel </Td> <Td> </Td> <Td> c. 1306--1376 </Td> <Td> English nobleman and admiral . Succeeded to the Earldom of Surrey in 1347 . </Td> </Tr> <Tr> <Td> John of Gaunt </Td> <Td> </Td> <Td> 1340--1399 </Td> <Td> Third son of King Edward III of England . Duke of Lancaster . Owned land in almost every county in England, with a household comparable to that of a monarch . </Td> </Tr> </Table> <Tr> <Th> Name </Th> <Th> Photograph / Portrait </Th> <Th> Lifetime </Th> <Th> Description </Th> </Tr> <Tr> <Td> Musa I of Mali </Td> <Td> </Td> <Td> c. 1280--c. 1337 </Td> <Td> Mansa Musa, or Musa I of Mali is considered one of the richest men in history . Musa was the tenth emperor of the Mali Empire, one of the prosperous Sahelian kingdoms that developed along the Saharan slave trade routes in the later medieval period . Mansa Musa made his fortune by exploiting his country's salt and gold production . Musa is said to have brought several tonnes of gold to Mecca when he made a pilgrimage there in 1324 . Reported as being inconceivably rich by contemporaries, "There's really no way to put an accurate number on his wealth ." </Td> </Tr> <Tr> <Td> William the Conqueror </Td> <Td> </Td> <Td> d . 1087 </Td> <Td> William the Conqueror became personally enormously wealthy from spoils of war during the Norman Conquest of England . </Td> </Tr>

Who is the richest person ever adjusted for inflation