[2] Gualdo Priorato served with Maurice, Prince of Orange, against the Spaniards, with d'Hauterive at La Rochelle, with Count Mansfeld, with Wallenstein and the Imperial Army, and finally with the Elector of Bavaria at the head of a Venetian regiment which was destroyed at the battle of Nördlingen.

[2] Priorato left Christina's retinue to work for emperor Leopold I and subsequently received the title of imperial councillor and court historiographer.

[2] In the fourteen years spent outside of Italy Gualdo Priorato gained a wealth of political and military experience, which was to his advantage to write his many historical works.

[5] His record as historian includes an account of the military actions between the Spanish and Austrian Habsburgs and Gustavus Adolphus, a history of the Fronde and another of Mazarin's ministry (commissioned by the latter in 1652), biographies of Louis XIV and Queen Christina and books on contemporary warfare.

[3] Gualdo Priorato was the author of the first biography of Wallenstein, Historia della vita d'Alberto Valstain duca di Fritland (Lyon, 1643).