Guillaume Le Vasseur de Beauplan (around 1600-December 6, 1673) was a cartographer, engineer and architect from France. He was in the military in the Polish-Lithuanian Commonwealth army from 1630 until the late 1640's. He was forced to move to the Ukraine. He was in the military under Stanisław Koniecpolski for one year in 1637. While in the military he helped rebuild the Kodak Fortress. He also built other fortresses in Bar, Ukraine. He also helped build Brody Castle and other buildings in Kremenchuk, Ukraine.