A centered, open-air medieval circu...

A centered, open-air medieval circular PvP colosseum shell, approximately 53 blocks wide and 16 blocks tall. Build only the outer ring and keep a completely empty circular opening 43 blocks wide in the center, with no floor, bridge, roof, hanging decoration, or inward projection. Use a four-block-thick stone-brick and deepslate wall with twelve evenly spaced recessed arches and outward-facing buttresses. Add two rising circular tiers of spruce seating inside the upper wall, supported by stripped spruce logs and dark oak beams, while keeping every seat and support behind the inner edge of the wall. Seal the backs of all arches so neighboring arenas cannot be seen through them. Finish the top with stone battlements, concealed warm lantern lighting, and alternating red and orange banners. Mai