The ground floor is still open for visitors, though they now enter and exit from a new door on the east side that was built in 1878. The old door to Teyler's fundatiehuis is closed off. The way the contents are displayed in the room has barely changed since 1800. In the central exhibition cabinets minerals have been showcased, as well as the Top of the Mont Blanc, separated from the mountain in 1787 by one of the first climbers of that mountain, Horace-Bénédict de Saussure. In the cabinets on the sides and outside cabinets, instruments are showcased. For example a world and celestial globe by George and Dudley Adams from London.