The Polytechnic Museum is the largest technical museum in Russia, and houses a wide range of historical inventions and technological achievements, including humanoid automata of the 18th century, and the first Soviet computers. The collection contains over 160,000 items in 65 halls including, chemistry, mining, metallurgy, transport, energy, optics, automation, computer engineering, radio electronics, communications, and space exploration. Highlights include the first achromatic telescope; an early solar microscope by German anatomists Johann Nathanael Lieberkühn; an early seismograph by Boris Borisovich Galitzine; galvanoplastics by Moritz von Jacobi; and early electric lights by Pavel Yablochkov.