Pieter (1661 – 1711) and David Mortier were brothers of French extraction whose publishing interests in Amsterdam covered a wide field embracing French and English works as well as Dutch. Pieter was probably trained in the bookselling business in Paris, and David, spent many years in England; in fact, he acquired British nationality and died there in about 1728. After Pieter’s death, his widow continued the business until their son, Cornelis, was able to take over; then, in 1721, Cornelis entered into partnership with his brother-in-law, Johannes Covens, to form the famous name Covens and Mortier, a firm which continued in being, with slight change of name until the middle of the nineteenth century. Johannes Blaeu published, during his life three town-books of Italy; Citta del Vaticano, Roma and Napoli. The fire of 1672 largely destroyed the main Blaeu workshop in Gravenstraat, Amsterdam, and much of the prepared material., However, even though Blaeu died the following year, work on the town-books continued, and in 1682 the completed work was published in Amsterdam by his heirs. The town-book was a great success and reissued several times by different publishers in Amsterdam, as late as 1726. Pierre Mortier re-issued all the Blaeu plates for the town book in the years 1704/05 (after acquiring them when the Blaeu firm finally closed in 1695) in an atlas comprising of four volumes. The plates were now signed “a Amsterdam chez Pierre Mortier” and we can assume that this map may have been part of another early atlas, Atlas Nouveau, published by Mortier around the same time, as he himself died in 1711.