The Medici-Laurentian Atlas, also known simply as the Medici Atlas (and other variants, e.g. "Laurenziano Gaddiano", "Laurentian Portolano", "Atlante Mediceo" or "Laurentian Atlas"), is an anonymous 14th-century set of maps, probably composed by a Genoese cartographer and explicitly dated 1351, although most historians believe it was composed, or at least retouched, later. The atlas is currently held by the Biblioteca Medicea Laurenziana in Florence, Italy.