At the beginning of the Spanish Protectorate in Morocco (1912-1956) the medina of Tetouan, with its walls and gates, was perceived as a fundamental part of the traditional city that was to be conserved. It is interesting to consider, in this sense, the concern that since the war of Tetuan (1859) was to obtain an adequate graphic representation of this architecture. Among the Maps of the Spanish Army Geographical Service are the first drawing that were made (scale 1:100) of the gates of the medina. They are signed by Francisco Gómez Jordana; Alejo Corso and Eduardo Álvarez in 1888. The purpose of this study is to publish the Bab Tut survey and its description. Thanks to this drawing we can know the exact status of the gate before the Spanish occupation and establish a documentary base that facilitates the recovery of this defensive heritage of the city of Tetouan.