The Blaeus: Willem Janszoon, Cornelis & Joan

Willem Jansz. Blaeu and his son Joan Blaeu are the seventeenth century's most widely known cartographic publishers.

Willem Jansz. (also written Guilielmus Janssonius) = Willem Janszoon Blaeu was born in Uitgeest (Netherlands), near Alkmaar, in 1571. He studied mathematics under Tycho Brahe and learned the theory and practice of astronomical observations and the art of instrument- and globe-making.

In 1596, he came to Amsterdam, where he settled down as a globe-, instrument- and map-maker. He published his first cartographic work (a globe) in 1599 and probably published his first printed map (a map of the Netherlands) in 1604. He specialised in maritime cartography, published the first edition of the pilot guide Het Licht der Zeevaert in 1608, and was appointed Hydrographer of the V.O.C. (United East India Company) in 1633. After publishing books, wall maps, globes, charts and pilot guides for thirty years, he brought out his first atlas, Atlas Appendix (1630). This was the beginning of the great tradition of atlas-making by the Blaeus.

In 1618, another mapmaker, bookseller and publisher, Johannes Janssonius, established himself in Amsterdam next door to Blaeu's shop. No wonder these two neighbours began accusing each other of copying and stealing their information and became fierce competitors who did not have a good word to say about each other. In about 1621 Willem Jansz. decided to end the confusion between his name and his competitor's and assumed his grandfather's nickname, 'blauwe Willem' ('blue Willem'), as the family name; after that, he called himself Willem Jansz. Blaeu.

Willem Janszoon Blaeu died in 1638, leaving his prospering business to his sons, Cornelis and Joan. We only know that Cornelis's name occurs in the prefaces of books and atlases until c. 1645.

Joan Blaeu, born in Amsterdam in 1596, became a partner in his father’s book trade and printing business. 1638, he was appointed his father’s successor in the Hydrographic Office of the V.O.C. His efforts culminated in the magnificent Atlas Major and the town books of the Netherlands and Italy – works unsurpassed in history and modern times, giving eternal fame to the name of the Blaeu's.

On February 23, 1672, a fire ruined the business. One year later, Dr Joan Blaeu died. The fire of 1672 and the passing away of the director gave rise to a complete sale of the stock of the Blaeu House. Five public auctions dispersed the remaining books, atlases, copperplates, globes, etc., among many other map dealers and publishers in Amsterdam. The majority was acquired by several booksellers acting in partnership.

In the succeeding years, the remaining printing department was left in the hands of the Blaeu family until 1695, when the printing house's inventory was sold at a public auction. That meant the end of the Blaeu's as a printing house of world renown.

Covens & Mortier. A Map Publishing House in Amsterdam. 1721-1866.

For almost two centuries, the most significant and crucial Dutch publishing house in commercial cartography was the Amsterdam firm of Covens & Mortier. Concerning quantity, it was the biggest contemporary map-trading house worldwide. They distributed innumerable maps, atlases, globes, and books.

Pieter (Pierre) Mortier (Leiden, 1661 – Amsterdam, 1711)

Nothing is known about the youth of Pieter Mortier. He studied in Paris from 1681 to approximately 1685. He must have come into contact with French 'libraires' and learned the bookselling trade there. In 1685, he returned to Amsterdam and opened a small bookshop. He joined the Book, Art Sellers' and Printers' Guild in the same year.

Pieter sold books in Dutch and foreign languages, but he also published books on his own, usually in French. His business flourished so much that in 1688, he was forced to rent another house on the Vijgendam.

Pieter Mortier's first privilege for maps was granted by the States of Holland and West Friesland on September 15 1690. It refers to the maps of Sanson that he 'is printing and correcting with great pains and care'.

Pieter began the large-scale publication of maps and atlases. By the beginning of the 18th century, Pieter had become so wealthy that he could purchase three houses in Amsterdam: the Beurssluis, on the Vijgendam, and the Heremietensteeg. He rebuilt the house on the Vijgendam into a large, prestigious house that would serve for over a century as a shop, business, and residential structure for Covens & Mortier's publishing house.

He died on February 13, 1711, after a brief illness. The company continued under Pieter's widow's management, Amelia' s-Gravesande.

After she died in 1719, her son, Cornelis, took over the management for a few years.

On November 20, 1721, a company was founded by Cornelis Mortier and Johannes Covens I. The latter was married the same year to Cornelis's sister. From that year on, the name of :

Covens & Mortier.

Their firm would see a massive expansion in the next 140 years. In 1732, the heirs sold the property to their brother Cornelis and his partner Covens. Their main competitors were Reinier & Josua Ottens and Gerard Valck & Petrus Schenck. After the death of Johannes Covens I (1774), his son Johannes Covens II (1722-1794) entered the business. In 1778, Johannes added a new company name :

J. Covens & Son.

Johannes Covens II was succeeded by his son Cornelis Covens (1764-1825), who, in turn, brought Peter Mortier IV, the great-grandson of Petrus Mortier I, into the business. The name was from 1794 to 1866:

Mortier, Covens & Son.

The last Covens in the series was Cornelis Johannes Covens (1806-1880).

Covens & Mortier had a large stock of atlases and maps, including Delisle, Jaillot, Johannes Janssonius, Sanson, and Claes Jansz. Visscher, Nicolaas Visscher, and Frederik de Wit. For decades, an impressive number of atlases came from the press.