"In the vast expanse of the cosmos, a majestic celestial metropolis emerges, amalgamating the advanced energy-harnessing prowess of a Dyson Sphere with the perplexing and intricate geometry of a Penrose Triangle. This expansive cityscape, rather than being a simple sphere encircling a star, manifests as a colossal, looping Penrose structure, its vertices and edges stretching seemingly infinitely, wrapping around the fabric of space itself. Each twist and turn of this unique geometry is lined with radiant structures, habitats, and energy conduits, all illuminated in a dance of neon hues, reflecting the advanced ancient civilization that calls it home. At the heart of this architectural marvel lies a potent, swirling black hole, its ominous yet mesmerizing presence contrasting with the vibrant city around it. This singularity, more than just a celestial phenomenon, serves as the metropolis's primary power source, as it harnesses its immense gravitational energy.