A limited color palette can be tricky to work with in a creation. I’ve done LEGO builds where I only used one color, and it was challenging. Cab ~ here has limited the palette in this cathedral to just three: light bluish grey, transparent red, and transparent yellow. The back-lit stained glass is beautiful, each window unique and telling part of the Easter story, according to the builder, if in an abstracted way. The vaulted ceiling, held together by interior flex tube, looks great, too. It does look a little bland with only grey, however, or maybe just incomplete; so perhaps now that the masons have finished their part, the rest of the artisans can get to work adding paintings, gilded ornaments, and tapestries to outfit the cathedral for its intended purpose, glorifying God.