I was born (1952 year) in a little mexican city, which name is Tepic. I left it when I was 15 years old in order to continue my studies in Mexico City. Since then, I have spent my life in this marvelous city, the biggest city of my country. I studied Sociology at Universidad Iberoamericana, and the work I made to become a sociologist was a text about the demography of the natural site in which is located Mexico City. I was a teacher about 30 years at that University, and between the courses I most liked teaching it was "The Mexico City´s History". I have collected more than 1000 slides, which are clasiffied according the different stages we can distinguishe about the history of Mexico City. Besides, I built a blog in which I put the guideline of each one of my clases.