Matthaus Merrian's engraving found in Martin Zeiller's Topographia Italiae, (Frankfurt, ca. 1640), Matthäus Merian

Birds-eye view of fortified valletta, with key. Note the cross of st. John on the compass rose on the inset map of the maltese archipelago. A second compass rose has a map of the italian peninsula. Matthäus merian's engraving found in martin zeiller's topographia italiae, (frankfurt, ca. 1640). Date: 1640.