Map of Portugal and Algarve by Johannes de Ram (1648-1693). The title cartouche in the upper left depicts cherubs holding the Portuguese coat of arms; a note within the cartouche explains that the longitudinal lines on the map are based from the prime meridian that runs through Tenerife in the Canary Islands. The scale cartouche in the lower right features Neptune with a trident and two cherubs holding the coat of arms of Algarve, then a semi-autonomous region of Portugal. Amsterdam. 52 x 62cm.