Maximilian I and Mary of Burgundy were not diamond people in any way. They were not geologists who found diamond resources. They were not diamond mining magnates who built huge conglomerates; they were not jewelers who set their creations with diamonds, and they clearly were not diamond traders renowned for their quick thinking. Yet this 15th century royal couple had a significant impact on the diamond industry, playing a pivotal, arguably even a crucial role in the development of diamonds in modern culture.