The Historical American Building Survey Drawings Collection consists of measured drawings of Indiana historic sites and structures, many of them in the format prescribed by the U.S. National Park Service for the Historic American Building Survey (HABS) and the Historic American Engineering Record (HAER). Survey teams organized and sponsored by HABS and HAER prepared the earliest drawings in the collection: twenty-eight sets dating between 1934 and 1970. Most of the drawings, however, date from 1970 to 2000, and were made by undergraduate architecture students at Ball State University as part of a required course where students learned American architectural styles, architectural terminology, and how to visually document historic structures. Buildings and bridges were meticulously measured, documented, and drawn according to scale. Many drawings often include historical analysis and a site plan. The students followed HABS standards, but the class was not officially affiliated with the national program.