Final answer:
Santiago first met Fatima in Saint James (Santiago de Compostela) during his pilgrimage.
Step-by-step explanation:
The answer to your question is that Santiago first met Fatima in Saint James, also known as Santiago de Compostela, in Spain.
This city is famous for being a holy pilgrimage site where bones believed to belong to Saint James were found. The Cathedral of Santiago de Compostela now stands on this site.
So, when Santiago met Fatima, it happened in Santiago de Compostela during his pilgrimage.