King of Prussia from 1840. He upheld the principle of the divine right of kings, but was forced to grant a constitution in 1850 after the Prussian revolution of 1848. He suffered two strokes in 1857 and became mentally debilitated. His brother William (later emperor) took over his duties.
The cog-wheel and rice plant stand for industry and agriculture. The stars represent the 14 states. Blue symbolizes peace. Red denotes courage. Effective date: 4 January 1974.