rotunda - the compositional type of a building round in plan, usually surrounded by columns and topped with a dome.
BLEND (Blender, filesize: 450 KB), OBJ (OBJ, filesize: 593 KB), FBX (Autodesk FBX, filesize: 896 KB), STL (Stereolithography, filesize: 642 KB), ABC (Alembic, filesize: 1.03 KB)