The petition is addressed to the governor the Holy Roman Empire in Wuerttemberg due to the fact, that Esslingen is a free imperial city (= Reichsstadt). The duke of Wuerttemberg was not the ruler of the city of Esslingen. So, the governor of the Holy Roman Empire - the deputy of the Kaiser in Wuerttemberg - was the responsible authority, not the duke.
The governor (= Statthalter) then passed on the case to the city.
It's a bit like D.C. (Washington), which is not part of Maryland.
The governor (= Statthalter) then passed on the case to the city.
It's a bit like D.C. (Washington), which is not part of Maryland.

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