The history of the condom is somewhat murky, with historians unable to ascertain when people even began using them. Despite being something of a punchline, condoms are responsible for saving countless lives and are one of the most important developments in maintaining public health.
#1. The oldest condoms
The oldest condoms ever excavated were found in a cesspit located in the grounds of Dudley Castle and were made from animal membrane, the condoms dated back to as early as 1642. Source