Did You Know?

The national anthem of Spain has no words.

 

The Marcha Real is the national anthem of Spain. It is one of only four national anthems (along with those of Bosnia and Herzegovina, Kosovo and San Marino) in the world to have no official lyrics.
After the 1868 Revolution, General Prim convoked a national contest to create an official anthem, but it was declared deserted, advising the jury that Marcha de Granaderos was considered as such. 

By Alfonso XIII's time, it was established by a Royal Circular Order (27 August 1908) that interpreted the harmonization of the march done by Bartolomé Pérez Casas, Major Music of the Royal Corps of Halberdier Guards. During the Second Republic, Himno de Riego was adopted as official anthem, although after the Spanish Civil War, Marcha Real returned to be used as anthem, sometimes sung with the verses written by the poet José María Pemán in 1928.

Source: en.wikipedia.org