Alexandru Ioan Cuza in the context of "Carol I of Romania"

Romania is a country located at the crossroads of Central, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to the east, and the Black Sea to the southeast. It has a mainly continental climate, and an area of 238,397 km (92,046 sq mi) with a population of 19 million people. Romania is the twelfth-largest country in Europe and the sixth-most populous member state of the European Union. Europe's second-longest river, the Danube, empties into the Danube Delta in the southeast of the country. The Carpathian Mountains cross Romania from the north to the southwest and include Moldoveanu Peak, at an altitude of 2,544 m (8,346 ft). Bucharest is the country's capital, largest urban area, and financial centre. Other major urban areas include Cluj-Napoca, Timișoara, Iași, Constanța and Brașov.

Settlement in the territory of modern Romania began in the Lower Paleolithic, later becoming the Dacian Kingdom before Roman conquest and Romanisation. The modern Romanian state was formed in 1859 with the unification of Moldavia and Wallachia under Alexandru Ioan Cuza, becoming the Kingdom of Romania in 1881 under Carol I of Romania. Romania gained independence from the Ottoman Empire in 1877, formalised by the Treaty of Berlin. After World War I, Transylvania, Banat, Bukovina, and Bessarabia joined the Old Kingdom, forming Greater Romania, which reached its largest territorial extent. In 1940, under Axis pressure, Romania lost territories to Hungary, Bulgaria, and the Soviet Union. Following the 1944 Romanian coup d'état, Romania switched sides to join the Allies. After World War II, it regained Northern Transylvania through the Paris Peace Treaties. Under Soviet occupation, King Michael I was forced to abdicate, and Romania became a socialist republic and Warsaw Pact member. After the uniquely violent Romanian revolution in December 1989, Romania began a transition to liberal democracy and a market economy.

The unification of Moldavia and Wallachia (Romanian: Unirea Moldovei și Țării Românești), also known as the unification of the Romanian Principalities (Romanian: Unirea Principatelor Române) or as the Little Union (Romanian: Mica Unire), happened in 1859 following the election of Alexandru Ioan Cuza as prince of both the Principality of Moldavia and the Principality of Wallachia. A potential unification between the two principalities, which shared a common Romanian ethnicity, language, and culture, had not been favored by the great powers for a long time, although it was accepted by them once it happened. The unification of these two states began a political struggle in the new country (the United Principalities of Moldavia and Wallachia) to find out which of the two regions would obtain "supremacy" and met some opposition in Moldavia by the so-called "separatists".

Nowadays, in Romania, the unification of Moldavia and Wallachia is regarded as a prelude to the Great Union, a name used in Romanian historiography to refer to the unifications of Romania with the regions of Bessarabia, Bukovina, and Transylvania in 1918 during or following the end of World War I. It is also commemorated every 24 January through the Day of the Unification of the Romanian Principalities in both Romania and Moldova.

The United Principalities of Moldavia and Wallachia (Romanian: Principatele Unite ale Moldovei și Țării Românești), commonly called United Principalities or Wallachia and Moldavia, was the personal union of the Principality of Moldavia and the Principality of Wallachia. The union was formed on 5 February [O.S. 24 January] 1859 when Alexandru Ioan Cuza was elected as the Domnitor (Ruling Prince) of both principalities. Their separate autonomous vassalage in the Ottoman Empire continued with the unification of both principalities. On 3 February [O.S. 22 January] 1862, Moldavia and Wallachia formally united to create the Romanian United Principalities, the core of the Romanian nation state.

In February 1866, Prince Cuza was forced to abdicate and go into exile by a political coalition led by the Liberals; the German prince Karl of Hohenzollern-Sigmaringen was offered the throne and, on 22 May [O.S. 10 May] 1866 he entered Bucharest for the first time. In July the same year, a new constitution came into effect, giving the country the name of Romania; internationally, this name was used only after 1877, since at the time it shared a common foreign policy with the Ottoman Empire. Nominally, the new state remained a vassal of the Ottoman Empire. However, by this time the suzerainty of the Sublime Porte had become a legal fiction. Romania had its own flag and anthem; after 1867, it had its own currency as well.

The Day of the Unification of the Romanian Principalities (Romanian: Ziua Unirii Principatelor Române) or, unofficially, the Little Union Day (Romanian: Ziua Micii Uniri), is a public holiday of Romania celebrated every 24 January to commemorate the unification of the Romanian Principalities (Moldavia and Wallachia), also known as the "Little Union", on 24 January 1859 under prince Alexandru Ioan Cuza. This event is deemed as important as it is considered the first step towards the goal of achieving a unitary Romanian state, something that is considered to have been achieved on 1 December 1918, when the Romanian National Assembly declared the union of Transylvania, Banat, Crișana, and Maramureș with the Kingdom of Romania.

The Day of the Unification of the Romanian Principalities was first adopted by the Senate on 2 June 2014 and later by the Chamber of Deputies on 3 December of the same year. The holiday became official when a few days later Romanian President Traian Băsescu signed a decree promulgating it on 16 December. Thus, Law No. 171/2014 dictates that, on 24 January, central and local authorities can provide material and logistical support to artistic and cultural events dedicated to this day. Since 2016, the observance is a non-working day in Romania.

Prince Domnitor, in full Principe Domnitor (Romanian pl. Principi Domnitori) was the official title of the ruler of Romania between 1862 and 1881. It was usually translated as "prince regnant" in English and most other languages, and less often as "grand duke". "Domnitor" is an adjective derived from the Romanian word "domn" (lord or ruler) and, in turn, from the Latin "Dominus". The title Domn had been in use since the Middle Ages and it is also the Romanian equivalent to the Slavic Hospodar. Moldavian and Wallachian rulers had used this term for their title of authority as the head of state, while "voievod" represented the military rank as the head of the army.

The title acquired an officially recognized meaning after Moldavia and Wallachia united to form the Romanian United Principalities under Alexander John I, who had become the ruler of both states since 1859. Alexander John abdicated in 1866 and was succeeded by Carol I, who promulgated the first constitution who officially used the name Romania for the country. He held the title until 1881. When Romania was proclaimed a kingdom in March 1881, Carol became its first king.

The two ad hoc divans were legislative and consultative assemblies of the Danubian Principalities (Moldavia and Wallachia), vassals of the Ottoman Empire. They were established by the Great Powers under the Treaty of Paris. By then, the Crimean War had taken the two states out of Russia's sphere of influence, and had nullified the Moldo-Wallachian Regulamentul Organic regime. Officially, the two assemblies were provisional replacements for the traditional assemblies, the Sfaturi (or Divanuri). The term "divan", is derived from the Ottoman rule, being the name of a high governmental body in a number of Islamic states.

The elections for the two Divans confronted two local movements: the National Party, which supported the unification of Moldavia and Wallachia, as "Romania"; the anti-unionists, which sought to maintain the status quo. The National Party emerged as the victor in 1859, when its candidate Alexandru Ioan Cuza was crowned Domnitor over both countries. The resulting United Principalities were the political embryo of modern Romania.

The University of Bucharest (UB) (Romanian: Universitatea din București) is a public research university in Bucharest, Romania. It was founded in its current form on 4 July 1864 (161 years ago) (1864-07-04) by a decree of Prince Alexandru Ioan Cuza to convert the former Princely Academy into the current University of Bucharest, making it one of the oldest Romanian universities. It is one of the five members of the Universitaria Consortium (a group of elite Romanian universities).

The University of Bucharest offers study programmes in Romanian and English and is classified as an advanced research and education university by the Ministry of Education.