circular fortress 3d model

A magnificent, circular fortress. A colossal, smooth gray stone wall encircles the entire base, with a single, large gate as the entrance. Inside, the base is tiered: an outer ring with low, symmetrical white stone barracks and workshops, leading down steps to an inner courtyard. At the very center stands a massive, circular arch of glowing gold, acting as a powerful portal or power source, with a shimmering blue energy field. The layout is perfectly symmetrical and defensible. Simple color scheme: gray walls, white buildings, gold arch, blue energy.