Complex sentence: The insect collections date from 1793 when Franz I of Austria purchased the scientific collections Joseph Natterer in 1806 the museum purchased a collection of European insects made by Johann Carl Megerle of Muehlfeld.
Split into simpler sentences: The insect collections date from 1793 when Franz I of Austria purchased the scientific collections of Joseph Natterer. In 1806 the museum purchased a collection of European insects made by Johann Carl Megerle of Muehlfeld.