The island of Satanazes (also called the island of Devils, or of the Hand of Satan or of St. Athanasius) is a legendary island once thought to be located in the Atlantic Ocean, and depicted on many 15th-century maps.
In 15th-century portolan charts, the island of Satanazes is depicted as lying out in the north Atlantic Ocean, due west of the Azores and Portugal, and just north of the legendary island of Antillia.
The island was first depicted in the 1424 portolan chart of Venetian cartographer Zuane Pizzigano. It is drawn as a large, blue rectangular island, indented with bays and five or six settlements, with the inscription ista ixolla dixemo satanazes, which has been translated as "this is the island called of the devils".
In his 1424 chart, Pizzigano placed Satanazes some sixty leagues north of the large Antillia island. Pizzigano capped Satanazes with a little umbrella-shaped island he labels Saya (which later cartographers will call Tanmar or Danmar). These three islands, plus Ymana (later called Royllo, a little companion west of Antillia), would be collectively drawn together in many later 15th-century maps, with the same relative size, position and shape Pizzigano originally gave them, and known collectively as the "Antillia group" or (to use Bianco's label) the insulae de novo rep(er)te ("islands newly reported").
In Grazioso Benincasa's 1463 atlas, the settlements on Satanazes island are named Araialis, Cansillia, Duchal, Jmada, Nam and Saluaga.
Cartographic appearances of Satanazes:
Significantly, the island of Satanazes is omitted on the maps of Bartolomeo Pareto (1455), Cristoforo Soligo (c. 1475) Grazioso's son Andrea Benincasa (1476) and the Nuremberg globe of Martin Behaim (1492), even though they all include Antillia and some retain Saya/Tanmar.