Chefchaouen also known as Chaouen, is a city in northwest Morocco and is noted for its buildings in shades of blue. Chefchaouen is situated just inland from Tangier and Tétouan. The city was founded in as a small kasbah (fortress)
Chefchaouen's blue walls are a popular subject of interest. There are several theories as to why the walls were painted blue. One popular theory is that the blue keeps mosquitos away, another is that Jews introduced the blue when they took refuge from Hitler in the 1930s. The blue is said to symbolize the sky and heaven, and serve as a reminder to lead a spiritual life.