In 1801, by the Treaty of Aranjuez, Charles became Crown Prince of Etruria, a newly created kingdom formed from territories of the Grand Duchy of Tuscany.
A liberal movement led him to abdicate Lucca in favor of the Grand Duke of Tuscany in October 1847 in exchange for financial compensation, as he wanted to retire to private life.
Two months later, in December 1847, at the death of the former Empress Marie Louise, he succeeded her as the reigning Duke of Parma according to what had been stipulated by the Congress of Vienna.
He regained control of Parma under the protection of Austrian troops, but finally abdicated in favor of his son Charles III on 14 March 1849.
Charles Louis's early life was overshadowed by the actions of Napoleon Bonaparte who was interested in conquering the Italian states.
[2] After a short visit to Napoleon in Paris, they moved to Florence taking residence in the Pitti palace, the former home of the Medici family.
In December 1802, the royal family of Etruria returned to Florence, but King Louis, who suffered from epilepsy and was frequently ill, died few months later on 27 May 1803.
Charles Louis was promised the throne of a new Kingdom of Northern Lusitania (in the north of Portugal), but this plan never materialized, due to the break between Napoleon and the Spanish Bourbons in 1808.
Maria Luisa was promised the Ducal Palace of Colorno in Parma and a substantial allowance, but Napoleon did not keep his word and Charles Louis with his mother and sister were held captive in Nice.
For the next four years, (1811–1815), Charles Louis lived under the care of his grandfather in the household of the exiled Spanish royal family in Rome.
Due to the vicissitudes of the early years of his life he had not received a formal political education, but through self-teaching, he acquired a vast knowledge.
His ideology was influenced by the enlightening and romanticism of the period that followed the restoration of the European peace after the end of the Napoleonic wars.
[3] In 1820, his mother arranged his marriage with Princess Maria Teresa of Savoy (1803–1879), one of the twin daughters of King Victor Emmanuel I of Sardinia.
He had built a Greek Orthodox chapel at his villa in Marlia, and he also flirted with Protestantism, which was viewed unfavourably by other Catholic courts.
His love for traveling created many difficulties in governing and he often signed decrees according to his state of mind at the moment without any real knowledge of the issues.
Aware that Lucca was headed to be annexed by Tuscany, Mansi aligned his policies with those of Florence, which was resented by Charles Louis.
However his weakness and his restless character did not allow Charles to escape the oppressive relations of protection and control exerted upon Lucca by the courts of Austria, Tuscany and Modena.
Mansi's death heralded a new period during which Charles Louis took the initiative more, but his court drew adventures from different nationalities and Lucca became a haven for liberals fugitives from other states.
In 1845 his son married princess Louise Marie Thérèse d'Artois, a daughter of the Duke of Berry and the only sister of the French legitimate pretender, the Count of Chambord.
By the treaty of Florence on 28 November 1844, between Charles Louis and the dukes of Tuscany and Modena, he had to give up his claim to the Duchy of Guastalla and the lands east of the Enza.
The treaty of Florence remained a secret for nearly three years, but once it became known it contributed to Charles Louis growing unpopularity both in Lucca and in Parma.
Need for money led the Duke, on the advice of Ward, who became Minister of Finance, to claim tax credits for titles dating back thirty years.
At first, Charles Louis tried to assert his authority, but the continuous unrest forced him to take refuge in the Villa of San Martino in Vignale.
[5] Thomas Ward arranged the premature handover; in a letter Charles told him "I can't describe to you how I feel and what a sacrifice I have made".
Only four months after regaining the throne of his ancestors, Charles II was forced to flee from Italy, finding refuge in the castle of Weistropp in Saxony.
During the First Italian War of Independence, the Austrian army decisively defeated the troops of Charles Albert at Custoza, and then at Milan, forcing him to sign the armistice of Salasco on 9 August 1848.
Satisfied with securing the Duchy of Parma for his family, Charles presented his final resignation on 14 March 1849 at Weistropp in Saxony abdicating on his son.
[7] Living as a private man, he dedicated his time to hobbies, alternating his stays between Paris, Nice and the castle of Weistropp in Saxony.
His grandson, Robert I, who was reigning in Parma under the regency of his mother, Louise Marie Thérèse, lost his throne in March 1860 during the Italian unification.
His wife, Maria Theresa, who lived in complete retirement as a nun in villa San Martino in Lucca, died on 16 July 1879.