At first, the Assembly did not plan to abolish the monarchy. But the idea became more popular as rebellions and protests broke out across France, more radical politicians started to lead the government, money problems became worse and foreign governments threatened to invade. Louis and his wife Marie Antoinette slowly became unpopular symbols of the "Ancien Régime" that people wanted to leave behind. Their failed escape from Paris in June 1791 was a disaster. It convinced many people that they were plotting with foreign governments to overthrow the Assembly. He was arrested during a riot in August 1792 and the monarchy was abolished the next month. The government took away his titles, calling him "Citizen Louis Capet", taking the surname from Hugh Capet, an early French king. He was put on trial by the National Convention, found guilty of treason, and executed by guillotine on 21 January 1793. He was the only king of France to be executed.