Willem and his son Joan Blaeu made a public announcement in an Amsterdam newspaper that they would publish their own full atlas in 1634. Their first atlas was completed in 1635 and appeared in four different versions: "Novus Atlas" (German edition, 208 maps in two volumes), "Theatrum Orbis Terrarum, sive, Atlas Novus" (Latin edition, 207 maps in two volumes; title refers to Ortelius' "Theatrum Orbis Terrarum"), "Toonneel des Aerdrycks" (Dutch edition, also 207 maps in two volumes) and finally "Theatre du Monde ou Nouvel Atlas" (French edition, 208 maps in two volumes (like the German edition)).