Vienna; 1st district: inside view of dome of the entrance hall of Natural History Museum Vienna (German: Naturhistorisches Museum Wien); The Natural History Museum was built according to the design of architects Gottfried Semper (1803 - 1879) and Carl Hasenauer (1833 - 1894). It was opened in 1889 by Emperor Franz Joseph I. Its collection has more than 30 millions of objects; making it one of the biggest of its kind; worldwide.