Gabriel de Vallseca

Signature of Gabriel de Vallseca from 1447 portolan chart

Gabriel de Vallseca, also referred to as Gabriel de Valseca and Gabriel de Valsequa (Barcelona, before 1408 - Palma, after 1467) was a cartographer of Jewish descent connected to the Majorcan cartographic school. His most notable map is the portolan of 1439, containing the first depiction of the recently-discovered Azores islands.