A semicircular place, as a semicircular arena, or room, or part of a room. "The collections will be displayed in the hemicycle of the central pavilion."
... of our hearts whom we had met in San Sebastian and Burgos and Valladolid and Madrid. We knew we should meet them in Seville and were not the least surprised. They were as glad and gay as ever, and in our common polyglot they possessed us of the fact that they had just completed the eastern hemicycle of their Peninsular tour. They were latest from Malaga, and now they were going northward. It was our last meeting, but better friends I could not hope to meet again, whether in the Old World or the New, or that Other World which we hope will somehow be the ... — Familiar Spanish Travels • W. D. Howells