Helsinki University Observatory housed the Department of Astronomy at the University of Helsinki, south Finland until end of 2009. It is now an astronomy-themed visitor centre and museum.
The Helsinki astronomical observatory was designed in cooperation by professor Friedrich Wilhelm Argelander and architect Carl Ludvig Engel. The building was finished in 1834. Its instruments and astronomical books had escaped the great fire in Turku and were then transferred to Helsinki. The observatory was among the most modern astronomical observatories of its time, and served as an example for several European observatories that were built afterwards, most notably Pulkovo Observatory.
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