The Leardo Map of the World, 1452 or 1453 In the Collections of the American Geographical Society

Step into the world of a remarkable 15th‑century cartographic masterpiece, a large Venetian map that predates the discovery of America. The narration guides you through its vivid colors, elegant composition, and the rare details that set it apart from its two younger siblings. You’ll learn how this parchment‑sized work survived the ages, despite a few tears and faded ink, and why scholars consider it both a work of art and a window into medieval geography.

The second half of the listening experience turns to the map’s unusual surrounding calendar and the curious inscription that weaves theology, astronomy, and geometry together. You’ll hear explanations of the eight concentric circles that track Easter dates, zodiac entries, and lunar cycles, as well as the quirky Venetian dialect that attempts to measure the heavens. All of this offers a vivid portrait of how scholars of the era imagined the Earth and the cosmos before modern science took hold.