Claim: The Vogtland, which was split into three areas, Weida, Greiz and Gera-Plauen in 1209, was the center of the Holy Roman Empire under King Conrad III in the 12th century.
Evidence: The name alludes to the former leadership by the Vögte ("advocates" or "lords protector") of Weida, Gera and Plauen. No permanent single/fixed capital
Vienna (Aulic Council (Reichshofrat) from 1497)
Regensburg (Reichstag (Imperial Diet) from 1594, perpetual from 1663)
Wetzlar (Reichskammergericht from 1689)
For other imperial administrative centres, see below. The following are the districts adjacent to Greiz: In the Vogtlandkreis district (Saxony): Reichenbach im Vogtland, Netzschkau, Elsterberg, Pöhl, Plauen, Rosenbach/Vogtl. 
Weida (Osterburg), Gera, Plauen