Covens & Mortier
Jean (Johannes) Covens and Corneille (Cornelius) Mortier were brothers-in-law who continued the publishing house founded by Pierre Mortier in Amsterdam in 1685 and called it Covens & Mortier .
When Pierre Mortier died in 1711, his widow continued the business until she died in 1719. Corneille Mortier inherited the company as his son. In 1721 he established a partnership with Jean Covens after he had married his sister, Agatha Mortier. In the same year Covens & Mortier acquired the Dutch publishing house de Wit .
Covens & Mortier contributed greatly to the success of French publishers and the relocation of map production from the Netherlands to France in the early 18th century . Covens & Mortier published works by Nicolas Sanson (1600–1667), Alexis-Hubert Jaillot (1632–1712) and Guillaume de l'Isle (1675–1726), as well as late Dutch master cartographers such as Frederik De Wit and Hugo Allard ( 1620–1684), and of course Pierre Mortier himself.