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.
Meanwhile, for a short time, from July 1899 to October 1900, as second person on the head of Observatory was Đorđe Stanojević (1858–1921).
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 World War I in 1918, the Austro-Hungarian army destroyed all the instruments in the observatory.

Nedeljković remains one of the most important figures in the history of Serbian astronomy.
He managed to acquire instruments for the new observatory from the war reparations from Germany, not spending the state money.
The total value of the instruments he obtained was three times higher than the entire cost of the construction of the new observatory building.
Instruments arrived in 1922.

In 1924, by ruling of the Faculty Council the Observatory was divided into two separate institutions: Astronomical Observatory and Meteorological Observatory of Belgrade University.
Vojislav Mišković (1892–1976), at the time already a well established astronomer engaged at Nice Observatory, France was appointed as the head of the Astronomical Observatory in 1926.
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. Meanwhile, for a short time, from July 1899 to October 1900, as second person on the head of Observatory was Đorđe Stanojević (1858–1921). 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 World War I in 1918, the Austro-Hungarian army destroyed all the instruments in the observatory.
Nedeljković remains one of the most important figures in the history of Serbian astronomy. He managed to acquire instruments for the new observatory from the war reparations from Germany, not spending the state money. The total value of the instruments he obtained was three times higher than the entire cost of the construction of the new observatory building. Instruments arrived in 1922.
In 1924, by ruling of the Faculty Council the Observatory was divided into two separate institutions: Astronomical Observatory and Meteorological Observatory of Belgrade University. Vojislav Mišković (1892–1976), at the time already a well established astronomer engaged at Nice Observatory, France was appointed as the head of the Astronomical Observatory in 1926.
Belgrade Observatory