Probably 1719 print of a rare map by Pieter Van Der Aa (1659-1733). Original 29 x 35 cm from private collection. Formosa is the main island of Taiwan.
Formosa Island is located in East Asia off the coast of mainland China, southwest of the main islands of Japan but directly west of the end of Japan’s Ryukyu Islands, and north-northwest of the Philippines.
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Satellite image of Formosa Island
Formosa Island – Taiwan, Republic Of China