Organized chronologically, the aerial photographs that make up this extraordinary collection chart the development of the capital of Colombia over a period of 50 years, from 1935 to 1985. The explosive growth of the city, both formally and informally, transformed it from a provincial town of only 300,000 to the hypnotic megacity it became by the end of the century, when its population had reached seven million. With a focus on the urban and architectural transformations, this collection of photos serves as visual testimony that progress can come with costs as well as benefits. "Organizadas cronologicamente, las fotografias aereas que conforman esta extraordinaria coleccion trazan el desarrollo de la capital colombiana en el medio centenar de anos que transcurre entre 1935 y 1985. Se observa aqui el vertiginoso crecimiento, formal e informal, que se da entre una ciudad provinciana, que apenas se acerca a las 300 mil almas, y la alucinante urbe de finales de siglo, que ya se aproxima a los siete millones de habitantes. Con un enfoque en las transformaciones urbanas y arquitectonicas, esta coleccion de fotos sirve como testimonio visual de que el progreso supone costos asi como beneficios."