Another issue has been the use of a hypopodium as a standing platform to support the feet, given that the hands may not have been able to support the weight. In the 17th century Rasmus Bartholin considered a number of analytical scenarios of that topic. In the 20th century, forensic pathologist Frederick Zugibe performed a number of crucifixion experiments by using ropes to hang human subjects at various angles and hand positions. His experiments support an angled suspension, and a two-beamed cross, and perhaps some form of foot support, given that in an Aufbinden form of suspension from a straight stake (as used by the Nazis in the Dachau concentration camp during World War II), death comes rather quickly.