How to build a citadel!

Step 1: Start with 7 squares + 3 pane windows, assemble first floor.

Step 2: Using 6 hollow squares + 2 pane windows assemble two towers.

Step 3: Use 4 rectangles and 4 castle battlements to create tower roof structures.

Step 4: Use 14 triangles to decorate citadel entrance.

Step 5: To decorate pass between two towers - use 2 rectangles and 2 triangles on top.

Step 6: Use 9 rectangles with 3 tall triangles on top - to create extra tower.

Done!