sentences:  As part of his duties he was involved in the planning of the city of Stockholm and the moving of the navy's dockyard from its original home on what is now Blasieholmen to the island of Skeppsholmen, which remained the main Stockholm naval base until the later 20th century.He was instrumental in organizing the expedition to establish the Swedish colony in North America, New Sweden, in modern Delaware, in 1637.He was also an industrialist, and in the 1630s established an ironworks at Vira, which produced weaponry for the Swedish armies in the Thirty Years War.