This is a 1977 photo of the Great House at Casa Grande Ruins National Monument

This image is a 1906 ground plan of Compound A at Casa Grande Ruins National Monument. It details all excavated rooms and the rooms are designated with an obsolete lettering system. The plan highlights those areas that had not yet been excavated at the time. .

This is a photo of the Great House at Casa Grande Ruins National Monument

This image is a 1922 map of prehistoric irrigation systems throughout the Salt River Valley. The map indicated where the Salt River meets the Gila River. The map labels and indicates the location of both the prehistoric irrigation canals and prehistoric settlements. Further, the map shows locations of petroglyph sites. The image also includes a short pamphlet outlining the history of the Hohokam existence and important time lines.

This is a photo of the Great House at Casa Grande Ruins National Monument

This image is a 1931 topo map of Casa Grande Ruins National Monument.

This is a photo of the Great House at Casa Grande Ruins National Monument

This is a photo of the Great House at Casa Grande Ruins National Monument

This is a photo of the Great House at Casa Grande Ruins National Monument

This is a photo of the Great House at Casa Grande Ruins National Monument

This is a photo of the Great House at Casa Grande Ruins National Monument

This is a photo of the Great House at Casa Grande Ruins National Monument

This is a photo of the Great House at Casa Grande Ruins National Monument

These images are plans for proposed drainage systems for Compound A at Casa Grande Ruins National Monument. The mapping shows placement and method of installation for drainage systems. Included are diagrams of drainage placement through both the compound walls and room walls within the compound.

This is a photo of the Great House at Casa Grande Ruins National Monument

This is a photo of the ruins of the Great House at Casa Grande Ruins National Monument.

This image is a 1931 topo map of Casa Grande Ruins National Monument.

This is a photo of the Great House at Casa Grande Ruins National Monument

This is a photo of the Great House at Casa Grande Ruins National Monument

This is a photo of the Great House at Casa Grande Ruins National Monument

These images are detailed topographic survey maps of Compound A at Casa Grande Ruins National Monument. The main focus of the map outlines in detail the drainage systems of the compound. The detail includes specifics regarding materials used, sizes and placement of these materials. The maps also detail holes made in the wall structures themselves to allow proper drainage.

Image reflects a profile of an original and corrected Drain Ditch in Compound A. Main drawing represents the Drain Ditch from South on West side and smaller drawing represents the same ditch From East on North Side.

This is a photo of the Great House at Casa Grande Ruins National Monument

These images are of the Indian Pageant, an annual event that took place between 1926 and 1930 on Compound B at the Casa Grande Ruins National Monument.

In der DDR wurden seit Beginn der 1970er Jahre zu Lehrerausbildungs- und Forschungszwecken Unterrichtsstunden auf 1-Zoll-Videobändern aufgezeichnet. Über zweihundert dieser Aufzeichnungen aus den Beständen der Ost-Berliner Humboldt-Universität, der Akademie der Pädagogischen Wissenschaften der DDR (APW) sowie der Pädagogischen Hochschulen Potsdam und Dresden blieben bis heute erhalten. Die Bänder gerieten nach der Friedlichen Revolution und der Wiedervereinigung in Vergessenheit und die Abspieltechnik an den Hochschulen der DDR wurde entsorgt. Erschwerend kam hinzu, dass es in den...