| Joseph Marie Piétri | |
| Office: | Prefect of Police of Paris |
| Term Start: | 21 February 1866 |
| Term End: | 4 September 1870 |
| Predecessor: | Symphorien Boittelle |
| Successor: | Émile de Kératry |
| Office2: | Senator of Corsica |
| Term Start2: | 22 June 1879 |
| Term End2: | 24 January 1885 |
| Predecessor2: | Jean Joseph Valéry |
| Successor2: | Paul de Casabianca Nicolas Péraldi |
| Birth Date: | 25 February 1820 |
| Birth Place: | Sartène, Corsica, France |
| Death Place: | Sartène, Corsica, France |
| Nationality: | French |
| Occupation: | Lawyer, public servant, politician |
Émile Joseph Marie Piétri (25 February 1820 – 4 January 1902), known as Joachim Pietri, was a French lawyer and public servant who was prefect of several departments, a repressive police chief of Paris in the last years of the Second French Empire and Bonapartist Senator of Corsica from 1879 to 1885.
Joseph Marie Piétri was born in Sartène, Corsica, on 25 February 1820.His parents were Angelo Francesco Pietri (1784–1848) and Giulia Pietri (1786–1853).His family was not wealthy.His brother was Pierre-Marie Piétri(fr), who later became prefect of the police of Paris from January 1852 to January 1858.Piétri studied law in Paris, then practiced as an advocate in Sartène.By ordinance of 31 August 1838 he was appointed justice of the peace in the Corsican canton of Rogliano.He was an enthusiastic supporter of the Revolution of 1848.On 9 August 1848 thanks to the support of his brother he was appointed sub-prefect of Argentan.He then became a supporter of Louis-Napoleon Bonaparte.
On 29 April 1850 Piétri married Palma de Rocca Serra (1830–1885) in Sartène.They had several children including Marinette (c. 1843–1941), Pomponne (1855–1880) and Louis (born 1872).Piétri was appointed sub-prefect of Brest on 9 May 1852.He became Prefect of Ariège on 3 April 1853.He was made an Officer of the Legion of Honour on 3 January 1855 for his dedication during an outbreak of cholera.He became Prefect of Cher on 6 November 1855, Prefect of Hérault on 5 January 1861 and of Prefect of Nord on 12 November 1865.He became known for his administrative qualities and support of the Bonapartist regime.
On 21 February 1866 Piétri was appointed Prefect of Police of Paris in place of Symphorien Boittelle.He was aged 46.By decree of 19 December 1866 he was made a member of the Imperial Commission of the Exposition Universelle of 1867.On 13 August 1867 he was made a Grand Officer of the Legion of Honour.
Piétri was energetic in repressing unrest.On 2 November 1867 he surrounded Montmartre Cemetery in Paris where 1,500 Republicans had gathered at the grave of the deputy Jean-Baptiste Baudin, who had been killed on a barricade on 4 December 1851 after the coup d'état of 2 December 1851 that brought Napoleon III to power.He also suppressed the demonstration in honour of Charles Augustin Sainte-Beuve, who had defended Ernest Renan in the senate.Piétri did not moderate the violence of his agents, and in December 1867 sent a circular to the police commissioners "to guard against any hesitation or failure."At the same time, he declared that "individual liberty has never been, under any regime, better guaranteed or better respected."
During the general elections of 1869 Piétri took a tough line with men who were hostile to the regime, and in a report to Napoleon on 28 November 1869 attacked powerful men such as Rouher and Persigny.After discovery of the plot that was judged at Blois in 1870 he encouraged the demonstrations on the boulevards of Paris in favour of war with Prussia.A decree of 27 July 1870, which was not published, made him a senator.After the defeat of France at the Battle of Sedan during the Franco-Prussian War he left France hastily on 4 September 1870 and joined Napoleon III in exile.
In 1872 Piétri applied to the government of Adolphe Thiers for a retirement pension.Although he did not qualify on age or years of service, a decree in April 1873 fixed his pension arrears at 6,000 francs.Léon Renault, the prefect of police, reported in January 1875 that Piétri was one of the most active members of the Bonapartist committee.He became a general councilor of Corsica.
On 22 June 1879 Piétri was elected Senator of Corsica on an imperialist platform by 256 votes against 227 for his opponent, Tomasi.He sat on the right with the Appel au peuple group.He voted against the application of laws to religious congregations, against changes to the judicial oath, against reform of the magistrature and against restoration of divorce.He left office on 24 January 1885.In the general election of 25 January 1885 he failed to be reelected, winning only 212 out of 744 votes.He was defeated by Paul de Casabianca, who won 477 votes.Piétri retired from politics after this.He died on 4 January 1902 in Sartène at the age of 82.