Prince Sixtus of Bourbon-Parma was born on March 18, 1886, in the Duchy of Parma, Italy. He belonged to the Bourbon-Parma family, a branch of the Bourbon dynasty, which has historical ties to the French and Spanish thrones. Sixtus was known for his military service during World War I and his involvement in various political activities. In 1919, he gained attention for proposing a peace plan to end the war, which was presented to the Allied Powers. His efforts were part of a broader movement among European royals to seek diplomatic solutions. Sixtus passed away on April 14, 1934, in Belgium.