Jan Jansson or Johannes Janssonius (1588 - 1664) was born in Arnhem, Holland. He was the son of a printer and bookseller and in 1612 married into the cartographically prominent Hondius family. Following his marriage he moved to Amsterdam where he worked as a book publisher. It was not until 1616 that Jansson produced his first maps, most of which were heavily influenced by Blaeu. In the mid 1630s Jansson partnered with his brother-in-law, Henricus Hondius, to produce his important work, the eleven volume Atlas Major. About this time, Jansson's name also begins to appear on Hondius reissues of notable Mercator/Hondius atlases. Jansson's last major work was his issue of the 1646 full edition of Jansson's English Country Maps. Following Jansson's death in 1664 the company was taken over by Jansson's brother-in-law Johannes Waesberger. Waesberger adopted the name of Jansonius and published a new Atlas Contractus in two volumes with Jansson's other son-in-law Elizée Weyerstraet with the imprint 'Joannis Janssonii haeredes' in 1666. These maps also refer to the firm of Janssonius-Waesbergius. The name of Moses Pitt, an English map publisher, was added to the Janssonius-Waesbergius imprint for maps printed in England for use in Pitt's English Atlas. More by this mapmaker...

Gerard Valk (September 30, 1652 - October 21, 1726) (aka. Valck, Walck, Valcke), was a Dutch engraver, globe maker, and map publisher active in Amsterdam in the latter half of the 17th century and early 18th century. Valk was born in Amsterdam where his father, Leendert Gerritsz, was a silversmith. He studied mathematics, navigation, and cartography under Pieter Maasz Smit. Valk and moved to London in 1673, where he studied engraving under Abraham Blooteling (or Bloteling) (1634 - 1690), whose sister he married, and later worked for the map sellers Christopher Browne and David Loggan. Valke and Blooteling returned to Amsterdam in 1680 and applied for a 15-year privilege, a kind of early copyright, from the States General, which was granted in 1684. In 1687, he established his own firm in Amsterdam in partnership with Petrus (Pieter) Schenk, who had just married his sister, Agata. They published under the imprint of Valk and Schenk. Also, curiously in the same year Valk acquired the home of Jochem Bormeester, also engraver and son-in-law of art dealer Clement De Jonghe. Initially Valk and Schenk focused on maps and atlases, acquiring the map plates of Jodocus Hondius and Jan Jansson in 1694. Later, in 1701 they moved into the former Hendrick Hondius (the younger) offices where they began producing globes. Valk and Schenk soon acquired the reputation of producing the finest globes in the Netherlands, a business on which they held a near monopoly for nearly 50 years. In 1702, Valk joined the Bookseller's Guild of which he was promptly elected head. Around the same time, Gerard introduced his son, Leonard, who was married to Maria Schenk, to the business. Leonard spearheaded the acquisition of the map plates of Frederick de Wit in 1709. Nonetheless, Leonard was nowhere near as sophisticated a cartographer or businessman as his father and ultimately, through neglect, lost much the firm's prestige. After his death, the firm was taken over by his widow Maria. Learn More...

Petrus Schenk (Pieter Schenck) the Elder (December 26, 1660 - 1711) was a Dutch engraver, globe maker, and map publisher active in Amsterdam and Leipzig in the latter half of the 17th century. Schenk, was born in Elberfield, Germany. He moved in Amsterdam in 1675, becoming the apprentice to Gerard Valk (Valck). In 1687, Schenk married Agatha Valk, Gerard Valk's sister and went into partnership with his brother-in-law under the imprint of 'Valk and Schenk'. Initially they focused on maps and atlases, acquiring the map plates of Jan Jansson and Jodocus Hondius in 1694. Later, in 1701 they moved into the former Hondius offices where they began producing globes. Valk and Schenk quickly became known for producing the best globes in the Netherlands, a business on which they held a near monopoly for nearly 50 years. Schenk's three sons, Pieter Schenk the Younger, Jan Schenk, and Leonard Schenk, all became engravers in their own right. Pieter Schenk the Younger inherited the business and ran his father's shop in Leipzig. His daughter, Maria Schenk, married Leonard Valk, the son of Gerard Valk, and continued to run the Valk and Schenk map engraving workshop in Amsterdam. Learn More...