From the mid-19th century until the Civil War, Madrid modernised and built new neighbourhoods and monuments. The expansion of Madrid developed under the Plan Castro, resulting in the neighbourhoods of Salamanca, Argüelles, and Chamberí. Arturo Soria conceived the linear city and built the first few kilometres of the road that bears his name, which embodies the idea. The Gran Vía was built using different styles that evolved over time: French style, eclectic, art deco, and expressionist.