Mansa Musa's hajj showed the world West Africa's wealth.

The evidence

1. The chain of transmitters — passage/muwatta-1-052

   1. person/malik-ibn-anas
   2. person/nafi-al-madani

   A Muwatta hadith with isnad.

2. chronicle — work/masalik-al-absar

   The Masalik al-Absar account of Mansa Musa's hajj and his gold, faithfully cond'en'sed from al-Umari.

3. object — place/timbuktu

   Timbuktu — the gold-and-books c'en'tre of his kingdom.