discovery.com brings us some codes:
Known as the Copiale Cipher, the mysterious text seen here was the work of a secretive 18th-century society. Discovered in East Germany and first examined in the 1970s, the 75,000-character cipher details the operations and rituals of this 300-year-old group.
The cipher was cracked by a team of U.S. and Swedish researchers led by University of Southern California computer scientist Kevin Knight. Interestingly enough, the code revealed the political leanings of the organization and its curious fascination with eye surgery.
Although a combination of human ingenuity and computing power solved this centuries-old text, there are still other codes, both modern and ancient, whose meanings have eluded even the most skilled cryptographers.