The Ottomans appointed Greek administrators (Phanariotes) to run the town from the 18th century. The revolution initiated by Tudor Vladimirescu in 1821 led to the end of the rule of Constantinople Greeks in Bucharest. The Old Princely Court (Curtea Veche) was erected by Mircea Ciobanul in the mid-16th century. Under subsequent rulers, Bucharest was established as the summer residence of the royal court. During the years to come, it competed with Târgoviște on the status of capital city after an increase in the importance of southern Muntenia brought about by the demands of the suzerain power – the Ottoman Empire. Bucharest finally became the permanent location of the Wallachian court after 1698 (starting with the reign of Constantin Brâncoveanu). Partly destroyed by natural disasters and rebuilt several times during the following 200 years, and hit by Caragea's plague in 1813–14, the city was wrested from Ottoman control and occupied at several intervals by the Habsburg monarchy (1716, 1737, 1789) and Imperial Russia (three times between 1768 and 1806). It was placed under Russian administration between 1828 and the Crimean War, with an interlude during the Bucharest-centred 1848 Wallachian revolution. Later, an Austrian garrison took possession after the Russian departure (remaining in the city until March 1857). On 23 March 1847, a fire consumed about 2,000 buildings, destroying a third of the city. In 1862, after Wallachia and Moldavia were united to form the Principality of Romania, Bucharest became the new nation's capital city. In 1881, it became the political centre of the newly proclaimed Kingdom of Romania under King Carol I. During the second half of the 19th century, the city's population increased dramatically, and a new period of urban development began. During this period, gas lighting, horse-drawn trams, and limited electrification were introduced. The Dâmbovița River was also massively channelled in 1883, thus putting a stop to previously endemic floods like the 1865 flooding of Bucharest. The Fortifications of Bucharest were built. The extravagant architecture and cosmopolitan high culture of this period won Bucharest the nickname of 'Little Paris' (Micul Paris) of the east, with Calea Victoriei as its Champs-Élysées. Between 6 December 1916 and November 1918, the city was occupied by German forces as a result of the Battle of Bucharest, with the official capital temporarily moved to Iași (also called Jassy), in the Moldavia region. After World War I, Bucharest became the capital of Greater Romania. In