thumb|left|Patriarch Michael enthroned, Madrid Skylitzes Frederick was with Leo throughout the campaign against the Normans until he was appointed to the embassy to Constantinople. On 28 May 1053, he was at the monastery of Montecassino, on 10 June at Sale, and on 18 June at Civitate.Wattendorff, pp. 10–13. U. Robert, pp. 9–11.
thumb|left|patriarch michael enthroned madrid skylitzes frederick was with leo throughout the campaign against the normans until he was appointed to the embassy to constantinople on 28 may 1053 he was at the monastery of montecassino on 10 june at sale and on 18 june at civitatewattendorff pp 10–13 u robert pp 9–11