Gratianos 2 was magister militum, superista of the Lateran palace and consiliarius ("Gratianum eminentissimum magistro militum et Romani palatii egregium superistam ac consiliarium"); during the papacy of Leo IV (Leo 121) from 847 to 855, he was accused before the Frankish emperor Louis (Lodoïchos 1) by another magister militum, Danihel (Daniel 8), of disloyalty to the Franks and of plotting to betray Italy to the Greeks; the case was heard at Rome in 855 in the presence of Lodoïchos 1 and pope Leo 121 and the charges were universally rejected; Daniel 8 was surrendered to Gratianos 2 to punish as he thought fit, but he granted him his life following the intercession of Lodoïchos 1: Lib. Pont. 105. 110-112. On the meaning of "Romanum palatium", see Duchesne, Lib. Pont. I, p. 139, n. 66. Gratianos 2 was styled superista of the Lateran palace ("sacri superista patriarchii"); later in 855, after the death of Leo IV (Leo 121), Gratianos 2 was arrested in the Campus Neronis, together with Theodoros 179, by Adalbert 2 and Bernard 3, the emissaries of the Frankish emperor, at the prompting of Anastasios 25: Lib. Pont. 106. 11.

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