France's national anthem is "La Marseillaise." The song was written in 1792 in Strasbourg by Claude Joseph Rouget de Lisle following France's declaration of war against Austria and was originally named "Chant de Guerre pour l'Armee du Rhin" ("War Song for the Army of the Rhine"). It was later renamed "La Marseillaise" after the city in which it was written. "La Marseillaise" was first played at a military parade in Paris on 20 April 1795. It has since become the official national anthem of France. Liside (lily) and tricolore (tricolour) are the two main elements used in French flags to denote its status as the national flag. Other symbols can be added to the flag, such as a shield with three red balls inside a circle (from the French royal coat of arms) or a white star with five black rays (representing the number 5 from the crown of France). The modern French flag was adopted in 1798 by the National Convention. It consists of three equal horizontal stripes of blue, yellow-green, and red; while the national emblem is placed between the green and red stripes. French citizens are required by law to display the French flag throughout France during ceremonies held to honor France or France's leaders, such as elections or commemorations of historical events.