A central soaring atrium allows cats to climb staggered internal corner shelves to reach a high lookout spire. The pointed arches and delicate cut-out details create an elegant piece of DIY cat furniture that looks artistic in living rooms. The color palette pairs natural kraft cardboard with translucent rainbow tissue paper window accents.

       +-------------------------------------------------+
       |           GOTHIC CATHEDRAL TOWER                |
       |                                                 |
       |                    /\                           |
       |                   /  \  <-- Spire Tower Top     |
       |                  /    \                         |
       |                 +------+                        |
       |                 | GOTHIC                        |
       |                 | POINTED                       |
       |                 | ARCH                          |
       |                 | WINDOW                        |
       |                 +------+                        |
       |                 | MAIN                          |
       |                 | ENTRY                         |
       |                 +------+                        |
       |                                                 |
       +-------------------------------------------------+

Step-by-Step DIY Assembly

  1. Construct High Atrium: Tape two tall wardrobe boxes vertically together, securing internal structural corner braces.
  2. Cut Gothic Pointed Arches: Trace and cut tall, pointed Gothic arches for main doorways and side window openings using a sharp utility knife.
  3. Add Faux Stained-Glass: Glue colorful non-toxic tissue paper over the interior faces of window cutouts to filter light inside the cat chamber.
  4. Build Triangular Spire Caps: Fold four triangular cardboard panels into tall pyramid cones, gluing them onto top corner towers.
  5. Install Staggered Climbing Steps: Glue heavy double-walled cardboard corner ledges inside the cathedral atrium for step-by-step climbing.