For researchers, students of Fatimid history, and members of the Ismaili community, finding a reliable is often the first step toward understanding the lineage of the Ahl al-Bayt and the succession of Imams from Hazrat Ali (AS) to the present Aga Khan.
Following the Nizari-Musta'li schism and the fall of the Ismaili state at Alamut to the Mongols, the Imams lived in concealment ( Dawr-e-Satr ) or under various guises in Persia. The Shajra is highly valued by historians precisely because it preserves the names and succession of the Imams during these obscure centuries. The Modern Era (The Aga Khans)
