Websters’ Instrument Makers Database
This database of instrument makers, or more precisely of their signatures, is a product of many years of research by Roderick and Marjorie Webster, longtime curators of the collection of scientific instruments at Chicago’s Adler Planetarium & Astronomy Museum.
Scientific Instrument Makers in the Netherlands
This website provides biographical data about instrument makers who were active in the Netherlands (data largely based on a card index used at Museum Boerhaave).
Polvere di Stelle [Stardust]
Digital platform of the National Institute for Astrophysics (INAF) for the Italian astronomical heritage. It contains the databases of astronomical instruments, books (including manuscripts), historical archives and artworks preserved by Italian observatories. In addition it has a digital showcase presenting digitized rare and valuable books.