The city of Houston has changed dramatically over its history. As Daniel E. Monsanto notes in his Postcard History Series book on Houston, “No better medium expresses the city's transformation than the postcard. It acts as a chronicle and a window through time. One can view the earliest beginnings of the city, including horse-drawn carts in the streets and grand railway depots, to our first skyscrapers and suburban development." So much of the history of Houston is contained in The Heritage Society’s collection of over 132 postcards.