The region which became Batavia came under Dutch control in 1619, initially as an expansion of the original Dutch fort and a new building on the ruins of the former Jayakarta. Coen decided to expand the original fort into a larger fortress on 2 July 1619, and sent plans for Batavia Castle to the Netherlands on 7 October of that year. The castle was larger than the previous one, with two northern bastions protecting it from a maritime attack. The Nassau and Mauritius warehouses were expanded with the erection of an eastern fort extension, overseen by Commander Van Raay, on 12 March 1619.