In some cases French officials removed or remodelled more recent pre-colonial Moroccan structures which had been visibly influenced by European styles in order to erase what they deemed as foreign or non-indigenous interference in Moroccan architecture. In turn, French architects constructed buildings in the new cities that conformed to modern European functions and layouts but whose appearance was heavily blended with local Moroccan decorative motifs, resulting in a "Mauresque" or Neo-Moorish-style architecture. This was especially evident in some cities like the capital of Rabat, where grand new administrative buildings were designed in this style alongside European-style boulevards. In some cases, the French also inserted Moroccan-looking structures in the fabric of the old cities, such as the Bab Bou Jeloud gate in Fes (completed in 1913) and the nearby "Collège Moulay Idris" (opened in 1918). The new French-built cities also introduced more modernist styles such as Art Deco. This heritage is especially notable in Casablanca, which became the main port city and the country's largest city during this period.