BPALMA DE MALLORCA: Spain's Princess Cristina was back in court Tuesday for trial along with 17 others, including her husband, on charges ranging from tax fraud to embezzlement.

Cristina, sister of King Felipe VI, faces two counts of tax fraud carrying a maximum prison sentence of eight years for allegedly failing to declare taxes on personal expenses paid by a company she owned with her husband, Inaki Urdangarin.

She is the first member of Spain's royal family to face criminal charges since the monarchy was restored in 1975 and the trial, which started January 11, has attracted enormous media interest.

The princess lost a last-minute legal battle last week to try to avoid continuing on trial when the court rejected arguments that her charges should be dropped because government officials say she committed no crime and should only face a tax evasion fine.

The case centres around Urdangarin who is accused of using his former title of Duke of Palma to embezzle about 6 million euros ($6.5 million) in public contracts through the nonprofit Noos Institute he co-ran. He faces a sentence of close to 20 years.

The princess and her husband arrived at the court together some 20 minutes before the trial resumed at 9.15 am (0815 GMT).

Defendants began testifying Tuesday and were to finish February 26. Cristina, 50, will be last to speak but it is not yet known on which day.

The case is being heard in Palma de Mallorca, the regional capital of Spain's Balearic Islands, because many of Urdangarin's business deals under investigation were for the islands.

Cristina denied knowledge of her husband's business activities during a 2014 closed-door court appearance.

Details about the couple's regal lifestyle that emerged from the pre-trial investigation from 2011-2014 outraged Spaniards as the country teetered on the edge of an economic crisis and the unemployment rate hit 27 percent.

The case was also seen as one of the reasons for the 2014 abdication of King Juan Carlos in favor of his son, Felipe.