Build RIFTMARK CITADEL on flat terr...

Build RIFTMARK CITADEL on flat terrain as a full walled medieval castle complex, not one giant building. Use a realistic layout: large outer curtain walls surrounding the whole area, with a central castle/keep inside and open space between for a small market, paths, and courtyard. Style: Western European medieval, clean and detailed up close. Use mostly stone bricks, deepslate trim, dark oak beams, and dark red/brown gabled roofs. Add 4 corner wall towers, a main gatehouse, battlements, arches, buttresses, windows, lanterns, and a central keep with 4 towers. Leave clear space inside the walls for market stalls, a well, paths, and small buildings. Put a large black banner with red border, white crown, and big white R on the central keep.