The Mathematisch-Physikalischer Salon (German: [mateˈmaːtɪʃ fyziˈkaːlɪʃɐ zaˈloːn], Royal Cabinet of Mathematical and Physical Instruments) in Dresden, Germany, is a museum of historic clocks and scientific instruments. Its holdings include terrestrial and celestial globes, astronomical, optical and geodetic devices dating back to the 16th century, as well as historic instruments for calculating and drawing length, mass, temperature and air pressure.