Red-yellow ensign adopted
Charles III adopted the red-yellow-red design for naval warships and other Spanish vessels by royal decree.
Bicolor unified nationally
A royal decree extended the bicolor design to Army, Navy, and National Militia flags and standards, making it a shared national symbol.
Republican tricolor replaced bicolor
The Second Republic adopted a red-yellow-murrey tricolor, replacing the bicolor as Spain’s national flag.
Bicolor restored by Nationalists
A decree restored the red-and-yellow bicolor as Spain’s flag in Nationalist-held territory during the Civil War.
Eagle added to the arms
The flag’s coat of arms was changed to include the Eagle of Saint John.
Flag design regulated
A new regulation fixed the bicolor flag’s design and specified versions for armed forces units, warships, and buildings.
Transition-era arms revised
The eagle’s wings and the placement of the pillars and motto were changed in a new flag design.
Constitution defined the bicolor
The Constitution specified three horizontal red-yellow-red stripes, with the yellow stripe twice the width of each red stripe.
Current coat of arms adopted
The current coat of arms was adopted for the flag, replacing the Franco-era eagle design.
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