Ottoman historiography located imperial origins in the Islamic caliphate, not ancient Turkish history

Evidence

Most of the other historical works of the period take the Ottoman Empire as the unit of study and seek its origins, not in the history of the ancient Turks, but in that of the Islamic Caliphate. — Bernard Lewis, From Babel to Dragomans, 2009

In his most important historical work, the Evrak-i Peris¸han (published in 1884), he gives biographies of Sultan Mehmed II, Sultan Selim I, Emir Nevruz Bey, and of Saladin. Most of the other historical works of the period take the Ottoman Empire as the unit of study and seek its origins, not in the history of the ancient Turks, but in that of the Islamic Caliphate. — Bernard Lewis, From Babel to Dragomans, 2009

Categorization

• XREF: Contrasts with later Kemalist historiography which re-based Turkish identity in pre-Islamic Central Asia; also connects to definitions of modern nationalism generally.
• corroborated: 2 independent passages support this claim — Bernard Lewis, From Babel to Dragomans: Interpreting…, 2009