Stage is wider than the parterre and ther are big aisles between parterre edges and amphitheatre. So all Parterre seats are consider to be "middle" seats.
It is an orchestra between the parterre and the stage. Because of it first rows of the parterre and not too close to the stage and you have best view from these seats. The orchestra is significantly below the parterre level, so you do not have any obstacles to see a performance.
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