Chapter 1. The Tribulations of an "Umbrella Term" / Chapter 2. Shared Memory, Culture, and Religion / Chapter 3. Migration and Social Ties / Chapter 4. Diasporic Metropolises / Chapter 5. Temporalities and Diasporic Segments / Chapter 6. Diasporas and Political Authorities / Chapter 7. Aggregation, Segregation, Neighbouring / Chapter 8. Minorities in the City / Chapter 9. Inter-diasporic relationships / Conclusion