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La Sphera

<I>La Sphera. Manuscript from the 15th century</I>

The late medieval geographical manuscript of 'La Sphera' by Leonardo Dati (1360-1425) and his brother Gregorio (Goro) is a description of the world in poetic form. It includes also drawings and scenes describing the costal profiles and navigation, probably based on earlier medieval prototypes. It is considered to be a predecessor of portolan charts. There are two copies of 'La Sphera' by Leonardo Dati in the A. E. Nordenskiöld Collection.