Flag of Spain depicts coat of arms of Spain
Royal Standards of Spain
The King of Spain uses a flag known as the Royal Standard. The Royal Standard of Spain consists of a crimson square with the Coat of arms of the King in the center. It is usually flown at the King's official residence, the Palacio de la Zarzuela, other Spanish royal sites, displayed on his official car as small flags. It is regulated by clause 2 of Royal Decree 527/2014, 20 June, an amendment to Title II of Spanish Royal Decree 1511/1977 adopting Flags, Standards, Guidons, Insignia and Emblems Regulation.The Royal Guidon (Guión), the monarch's military personal ensign, is described by Rule 1 of Royal Decree 527/2014, an amendment to Title II, Rule 1 of Spanish Royal Decree 1511/1977. It is nearly identical to the Royal Standard except that the Royal Guidon has a Gold fringe. It is made of silk taffeta. The size of the guidon is 80 cm × 80 cm (31 in × 31 in). It is the personal command ensign or positional flag of the monarch, and is carried nearby him.
The heir to the crown, the Princess of Asturias, has her own standard and guidon. The Standard of the Princess of Asturias is regulated by Royal Decree 284/2001 that modified the Title II of Spanish Royal Decree 1511/1977. The Standard of the Princess of Asturias consists of a light blue (the colour of the flag of Asturias) square flag with the coat of arms of the Princess of Asturias in the center. The Guidon is identical to the Standard except that the Royal Guidon has a gold fringe. It is made of silk taffeta. The size of the guidon is 80 cm × 80 cm (31 in × 31 in). It has fallen into disuse because of the Princess's young age.Philip V and the new Bourbon dynasty
The arms of Bourbon-Anjou were added in 1700 when Philip V became king of Spain. He introduced several changes on the royal arms. The king's new arms were designed by the French heraldists Charles-René d'Hozier and Pierre Clairambault in November 1700. Philip V also changed the philosophy and the design of the flags of Spain. He was the first to give Spain a unified symbol of its own when putting on white fabric the Cross of Burgundy and the Royal coat of arms. It still was not a national flag, but a first "try", in line with similar attempts in other European nations.
The flags were organized in three groups: