What are Curved tops of windows or doors to make buildings stronger?

Curved tops of Windows or doors, often seen in architectural designs like arches, enhance the structural integrity of buildings by distributing weight more evenly. This curved shape allows for better load-bearing capacity, reducing the risk of stress concentration at any single point. Additionally, they can improve aesthetic appeal and allow for larger openings while maintaining strength. The use of arches and curved designs has been a fundamental principle in architecture for centuries.