King Juan Carlos of Spain abdicates

King Juan Carlos of Spain has decided to abdicate after a reign of nearly 39 years. King Juan Carlos, who is widely credited with consolidating the country's democracy, will step down in favour of his son Prince Felipe.

His decision was announced to the nation by Prime Minister Mariano Rajoy, who urged Spaniards to show their gratitude to the 76-year-old monarch. "He has been the best spokesman and representative of Spain in all corners of the world," said the Spanish leader.

He went on to pay tribute to the outgoing sovereign as "a tireless defender of our interests," adding: "I am convinced this is the best moment for change".

King Juan Carlos of Spain is stepping down from the throne

Mr Rajoy also expressed his confidence in the 46-year-old Prince, who will become Felipe VI, citing "his preparation, character and extensive experience in public affairs". The King is expected to address his fellow countrymen later on Monday morning and the Spanish cabinet will meet on Tuesday to discuss the issue.

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The move comes after years of speculation that such a move was planned. Felipe and his wife Crown Princess Letizia, a glamorous former TV news anchor, have been taking a more active role in representing Spain since the King suffered health problems in 2012.

He had a series of operations on his hip after falling during an elephant hunting trip in Botswana. In response to criticisms about the holiday during Spain's recession the monarch apologised.

The crisis followed a judicial investigation into his son-in-law, Iñaki Urdangarin, on allegations of corruption. It's claimed that the former Olympic handball champion used a foundation he headed to divert public funds.

 Prime Minister Mariano Rajoy

Despite the problems of the last few years the sovereign has remained a powerful figure in Spain's national identity. He was seen as a unifying figure following the end of Franco's dictatorship.

When Juan Carlos was born in Rome on January 5, 1938, the chances of him acceding to the Spanish throne looked remote.

His grandfather, Alfonso XIII, had been forced into exile in 1931 first to Italy and then to Lisbon.

From the age of nine he was educated in Spain. In 1954 he enter Spain's premier military academies, graduating as a naval, army and air force officer complete with pilot's wings.

Juan Carlos, who is a graduate of Madrid's Complutense University of Madrid, was designated Franco's heir in 1969. When the dictator died in 1975, the dashing young Spanish royal was crowned flanked by his wife Sofia of Greece, whom he wed in 1962.

Prince Felipe and his wife Crown Princess Letizia

Three children were born of their marriage - Elena in 1963, Cristina two years later and a son and heir, Felipe, in 1968.

In 1981, he faced the biggest crisis of his career when ultra-conservative army officers attempted a right wing coup. Juan Carlos appeared on TV and ordered all military units back to their garrison.

For his bold actions on that night, the King will always be remembered with gratitude.