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On 19 March 1805, Elisa Bonaparte became Duchess of Piombino for the Duchy of Piombino, and soon after she became Duchess of Lucca. Piombino and Lucca were then merged into a single principality, and she became Duchess of Lucca and Piombino. It was because of Napoleon's reward that Elisa Bonaparte became duchess, so why did she gradually deteriorate with her brother after that, the captain will tell you in detail.
First, from a famous family

Maria Anna Elisa Bonaparte Basis Oxchi
Maria Anna Elisa Bonaparte Paseoch was born on 3 January 1777 in Ajaccio, Corsica, daughter of Carlo Maria di Boonabas, sister of Napoleon. Although the Bonaparte family was only a dilapidated aristocrat in Corsica, Elisa Bonaparte was still well educated. In 1784, Elisa Bonaparte was awarded a scholarship to the Royal School of Saint-Louis for her excellent grades, so she went to the French mainland to study.
Second, become a princess
Felice Pascale Basil Oxid
In 1795, the Bonaparte family moved to Marseille, where Elisa Bonaparte lived with her family, and she fell in love with Felice Pascale Basioch. Although Felice Paseoix was from the Corsican nobility and his family was more prominent than that of Bonaparte, France had been transformed into a republic, so his family was in decline and his own position was not high. Napoleon was already in France at the time, already serving as commander-in-chief of the Italian Front, and therefore wanted his sister Elisa Bonaparte to marry a prominent family, so he objected to the marriage between the two.
In June 1797, Elisa Bonaparte insisted on marrying Felice Basioch, and Napoleon was so fond of his sister that he had to support him. In 1799, Elisa Bonaparte moved to Paris with her family and became obsessed with theatrical performances. In 1804, Napoleon declared herself emperor and established the French Empire, which made her a member of the French royal family.
Napoleon
In March 1805, Napoleon granted the Duchy of Piombino on the Italian peninsula to Elisa Bonaparte, and in June Napoleon granted her the Republic of Lucca as a fiefdom. Lucca and Piombino were then merged into the Duchy of Lucca and Piombino, thus making Elisa Bonaparte Duchess of Lucca and Piombino, and her husband Felice Basio Occhi as Duke of Lucca and Piombino.
Principalities of Lucca and Piombino
Elisa Bonaparte was dominant in the Principalities of Lucca and Piombino, and her husband, Felice Bake Occhi, served only as an auxiliary to his wife in governing the principality, mainly for military decision-making. At the same time Napoleon sent officials to Lucca and Piombino to help his sister Elisa Bonaparte administer the principality.
Iii, Grand Duchess of Tuscany
The French Empire
In March 1806, Napoleon incorporated Massa-Carrara into the Duchy of Lucca and Piombino, and due to the abundance of marble in the area, Elisa Bonaparte established the Academy of Fine Arts in the local area to attract artistic talents to enhance her prestige. Luca and Piombino followed france's example in reforming: confiscating ecclesiastical property; establishing public welfare committees to provide free medical care to the poor; encouraging agriculture, commerce, and technology; and enacting new laws in accordance with the French Civil Code.
In December 1807, Napoleon deposed the Etruscan kingdom because it could not prevent British goods from entering the European continent through the country and incorporated it into France. In March 1809, Napoleon established the Grand Duchy of Tuscany in the homeland of the Kingdom of Etruscany, with Elisa Bonaparte as Grand Duke of Tuscany and Felice Basil Oakchi as Grand Duke of Tuscany. The Grand Duchy of Tuscany, although nominally a Grand Duchy, was in fact a province directly administered by the French Empire, so elisa Bonaparte's Archduke of Tuscany was only an honorary position.
In April, Elisa Bonaparte, Grand Duke of Tuscany, visited florence, but she was not welcome in Tuscany due to french forced conscription there. Elisa Bonaparte loved the arts and continued to fund the development of the arts and sciences in the local area.
Pius VII
In 1809, Napoleon expelled Pope Pius VII because he did not want to attach himself to France, so he sent troops to invade Rome and arrested Pius VII. Elisa Bonaparte disagreed, and urged the French troops passing through Tuscany to leave her territory as soon as possible, leading to a deterioration in her relations with Napoleon. Napoleon then demanded more financial support from Elisa Bonaparte, but napoleon was dissatisfied with the fact that her territory was too small to provide that much money, so the relationship with Elisa Bonaparte became worse and worse, so her territory was reduced.
Fourth, forced into exile
Napoleon abdicated
In 1814, when the coalition invaded the Italian peninsula, Elisa Bonaparte had to flee the Grand Duchy of Tuscany. When Napoleon abdicated, Elisa Bonaparte, with the help of her brother Jérôme Bonaparte, was able to flee to Trieste, Austria, where she remained until her death in 1820.
By and large, Elisa Bonaparte was Napoleon's favorite sister, so she was given the duchy of Piombino and Lucca, becoming the local duchess and later grand duchess of Tuscany. But Elisa Bonaparte loved art and was not interested in war, so she refused to provide sufficient financial support for her brother Napoleon's expansion, which led to a gradual deterioration in relations between the two sides.