Again With the Medieval Research

I have been trying to pinpoint what the local government in Salerno was from 1200-1250 or thereabouts. I know the city was more-or-less under the rule of the Kingdom of Sicily/HRE-with some notable comings and goings (Frederick II, who was ruler for most of that time, was four in 1198 when he was orphaned and left to a miscellaneous hodgepodge of regents, "uncles", the pope, etc. until 1212). It's complicated by the fact that the city took the wrong side in a quarrel between Tancred, the pretender to the Sicilian throne, and Henry II (and his wife Constance, who was the heir to the that same throne) and was sacked in the 1190s as punishment.

I know that Frederick was raised to be a Sicilian, rather than a German, monarch, and that he was headquartered in Palermo. He took a serious interest in the arts and in the medical school in Salerno. And I have it from at least one source that the Hohenstaufen kings (of whom Frederick was one) tended to replace local lords with Northern Italians whose loyalty was more reliable. What I have not been able to find out is who was running the damned city. A viceroy? A governor? A local lord (in which case, what rank? Count? Duke? Baron?)? Some smaller "royal" cities were administered by local councils.

The political landscape of what we now call Italy was like a football field; depending on which quarter, who held the football changed wildly. It's a pain in the ass is what it is.