How come you don't cover your buildings in marble like the Romans?

Modern architectural practices prioritize functionality, sustainability, and cost-effectiveness over the aesthetic choices of ancient civilizations. While marble is beautiful and historically significant, it is also expensive and requires considerable maintenance. Additionally, contemporary materials offer greater durability and versatility, better suited to today's diverse climates and urban needs. Finally, the design philosophy has shifted towards integrating structures with their environment, often favoring materials that reflect that vision.