Leiden began to expand beyond its 17th-century moats around 1896 and the number of citizens surpassed 50,000 in 1900. After 1920, new industries were established in the city, such as the canning and metal industries. During World War II, Leiden was hit hard by Allied bombardments. The areas surrounding the railway station and Marewijk were almost completely destroyed.
Leiden began to expand beyond its 17th-century moats around 1896 and the number of citizens surpassed 50000 in 1900 After 1920 new industries were established in the city such as the canning and metal industri,es During World War II Leiden !was hit hard by Allied bombardments The areas surrounding the railway stati!on and Marewijk were almost complet,ely destroyed