Passage: Shirin farko na cibiyar sadarwa na metro a Istanbul, mai suna Avant Projet d'un Métropolitain à Constantinople kuma wanda injiniyan Faransa L. Guerby ya tsara, ya fara ne a ranar 10 ga Janairu, 1912. Shirin ya ƙunshi tashoshi 24 a tsakanin yankunan Topkapı da Şişli kuma ya haɗa da haɗin kai ta hanyar Golden Horn. Kowace tashar za ta sami dandamali mai tsawon mita 75 kusa da layin dogo, yayin da nisan tsakanin tashoshin ya bambanta daga mita 220 zuwa 975 mita. A yau an nuna zane-zanen aikin, wanda ba a taɓa gane shi ba, a Gidan Tarihi na Jami'ar Fasaha ta Istanbul. A cikin 1936 mai tsara birane na Faransa Henri Prost, ya ba da shawarar cibiyar sadarwar metro tsakanin gundumar Taksim da Beyazıt, zuwa arewa da kudu na Golden Horn, bi da bi. A watan Oktoba 1951 kamfanin Nederlands Nedeco ya ba da shawarar hanyar wucewa tsakanin Taksim da Bevin, a 1952 kuma ya haɗa da haɗin kai ta hanyar Golden Horn. Ko da yake an fara gina tashar tashar tashar jirgin kasa mai tsawon mita 75 a kusa da
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