Let's make this birthday one to remember.

87 years old (Born on October 12, 1937)

Happy Birthday, Robert Mangold! May your celebrations be as elegantly minimal yet intriguingly complex as your iconic "Grey Window Wall." Here's hoping the cake is simple in design but rich in layers—much like your timeless masterpieces.

Your remarkable journey from the subtle brilliance of 1964's creations to the expansive beauty of the twelve-canvas "Column Structure" series continues to inspire. Each year adds another canvas to life's gallery, and yours remains a masterpiece. Cheers to you for proving that simplicity can indeed speak volumes—and may this birthday bring joy that's anything but minimal!