Background: Mihail Kogalniceanu (Romanian pronunciation: [miha'il kog@lni'tSeanu] ( listen); also known as Mihail Cogalniceanu, Michel de Kogalnitchan; 6 September 1817 - 1 July 1891) was a Moldavian, later Romanian liberal statesman, lawyer, historian and publicist; he became Prime Minister of Romania on 11 October 1863, after the 1859 union of the Danubian Principalities under Domnitor Alexandru Ioan Cuza, and later served as Foreign Minister under Carol I. He was several times Interior Minister under Cuza and Carol. A polymath, Kogalniceanu was one of the most influential Romanian intellectuals of his generation. Siding with the moderate liberal current for most of his lifetime, he began his political career as a collaborator of Prince Mihail Sturdza, while serving as head of the Iasi Theater and issuing several publications together with the poet Vasile Alecsandri and the activist Ion Ghica.
Context: In April 1849, part of the goals of the 1848 Revolution were fulfilled by the Convention of Balta Liman, through which the two suzerain powers of the Regulamentul Organic regime--the Ottoman Empire and Russia--appointed Grigore Alexandru Ghica, a supporter of the liberal and unionist cause, as Prince of Moldova (while, on the other hand, confirming the defeat of revolutionary power in Wallachia). Ghica allowed the instigators of the 1848 events to return from exile, and appointed Kogalniceanu, as well as Costache Negri and Alexandru Ioan Cuza to administrative offices. The measures enforced by the prince, together with the fallout from the defeat of Russia in the Crimean War, were to bring by 1860 the introduction of virtually all liberal tenets comprised in Dorintele partidei nationale din Moldova.  Kogalniceanu was consequently appointed to various high level government positions, while continuing his cultural contributions and becoming the main figure of the loose grouping Partida Nationala, which sought the merger of the two Danubian Principalities under a single administration. In 1867, reflecting back on his role, he stated:  "There is not a single reform, not a single national act, from which my name would be absent. All the major laws were made and countersigned by me."  He inaugurated his career as a legislator under Prince Ghica. On December 22, 1855, legislation he drafted with Petre Mavrogheni regarding the abolition of slavery was passed by the Boyar Divan. This involved the freeing of privately owned Roma slaves, as those owned by the state had been set free by Prince Sturdza in January 1844. Kogalniceanu claimed to have personally inspired the measure. Ghica was prompted to complete the process of liberation by the fate of Dinca, an educated Roma cook who had murdered his French wife and then killed himself after being made aware that he was not going to be set free by his Cantacuzino masters.  Prince Ghica also attempted to improve the peasant situation by outlawing quit-rents and regulating that peasants could no longer be removed from the land they were working on. This measure produced little lasting effects; according to Kogalniceanu, "the cause [of this] should be sought in the all-mightiness of landowners, in the weakness of the government, who, through its very nature, was provisional, and thus powerless".
Question: What else is significant?

Answer:
He inaugurated his career as a legislator under Prince Ghica.