Located in the picturesque surroundings of the Upper town, just 10 minutes from the main square, the Zagreb Observatory is a must-see attraction for all those interested in astronomy.
It's placed in Opatička 22 in a tower called Popov toranj (or Priest's Tower), erected in the 13th century and formerly owned by the Archbishop of Zagreb. The Observatory was officially opened on the 5th December 1903, while its international renown received a boost after the Heidelberg astronomer August Kopff named a newly discovered planetoid Nr. 589 (spotted in 1906) "Croatia" in honour of the opening of the Observatory.
Today the Zagreb Observatoy is considered to be one the oldest European institutions for popularization of astronomy. The Croatian Astronomical Society and the Astronomical Association of Zagreb (ZAS) entrusted the Observatory with the organizational care for school competitions in astronomy, and organized several seminars for teachers, scientific seminars and invited lectures. The Observatory is visited by many thousands of school children and citizens throughout the year and, thanks to the new equipment, the visitors can experience the universe in which we all live.
The Observatory is open every evening from Tuesday to Friday and it's free of charge.
Make sure to check the official Zagreb Observatory website for more info about the history of the observatory, interesting lectures, astronomy courses and exact visiting hours.