and seismology. After five years, he returned in 1884 in Belgrade and became a professor of astronomy and meteorology at the Great School. He launched a campaign for the establishment of observatory at Grand School, but was rejected because of the financial situation. Finally, after three years, the decree of the founding of the Observatory was signed on by the Minister of Education and Church Affaires of Kingdom of Serbia Milan Kujundžić Aberdar on the initiative of professor Nedeljković. Nedeljković was appointed first director. On 1 July 1887 Nedeljković took over as the head of the provisory astronomical and meteorological observatory which was located in the rented house of the Gajzler family at 66 Svetozara Markovića Street. Located at the crossroads of the Vojvode Milenka and Svetozara Markovića streets in the historical neighborhood of Vračar (though today administratively in the municipality of Savski Venac), the house still stands today. History Foundation Adopting the request of Nedeljković, a new Minister of Education, Vladan Đorđević passed on 27 September 1888, on the Feast of the Cross day, the Regulation on the establishment of unified network of meteorological stations in the Kingdom of Serbia. Then Observatory become Central meteorological station for data collection. Astronomical-meteorological observatory Observatory was operating in the Gajzler house until 1 May 1891, when it was moved into its own building. specifically constructed for that purpose at 8 Bulevar Oslobođenja. It was constructed according to the design of architect Dimitrije T. Leko and equipped with the modern small instruments for astronomical and meteorological observations. Also, then are made in funcion two small astronomical pavilion. The Observatory was a "workshop" for practical training for the students of the Grand School and People's Observatory (on an artificial hill were located Bardu field glasses) where the most frequent guests were students, citizens and prominent persons – for example, in 1910, Halley's comet was observed. Apart from its importance for astronomy and meteorology, the newly built Observatory, headed by Nedeljković, was a cradle of the seismic and geomagnetic researches in Serbia. Thanks to Nedeljković's colleague and friend Miklós Konkoly, the founder of modern Hungarian astronomy and meteorology, the observatory was equipped with a seismograph. New observatory building was located close to the previous, across the Vračar plateau. In the 1950s a park was planted around it which in 2010 was named Park Milutin Milanković. During the withdrawal from Belgrade at the end of the