Pre-1860s vernpotter.com When we didn't have a centralized bank, private banks would issue their own notes. So your paper "money" might look different depending on what institution you got it at. 1860s planetoddity.com At this point — during the Civil War — these United States Notes or Legal Tender gained a nickname you've probably heard: Greenbacks. 1860s rebelstatescurrency.com The Confederacy actually had currency of their own. And it certainly reflected the values and circumstances of the South — this note depicts a slave loading cotton into a wagon. 1863 currency.ha.com A very rare Gold Certificate. This would have represented actual gold coins. It's up for auction with a starting bid of $900,000. So if you have money...to buy money...go for it. 1878 currency.ha.com The introduction of Silver Certificates featured a portrait of James Monroe. 1880s planetoddity.com A $100 United States Note featuring Abraham Lincoln. 1890 planetoddity.com Here's what was called a Coin Note, to be used for purchase of "silver bullion" aka silver coins. And featured some general no one remembers. 1914 planetoddity.com Here's where the $100 bill gets its famous nickname — when Benjamin Franklin was finally put on the front. 1929 planetoddity.com This year saw a big change — the bills shrank in physical size to become the dimensions we are now used to today. 1934 planetoddity.com Minor physical changes. But the note no longer allowed the bearer to redeem it for gold. 1966 planetoddity.com The back now features "In God We Trust." 1990s planetoddity.com Remember these guys? These bills included security features like a metallic security strip. 1996 planetoddity.com A major overhaul of the $100 bill brings a re-vamped design with even more security features — a hologram-like watermark, extremely small red and blue fibers, and black light capabilities. Damn, money is complicated. 2013 Voilà! Here's your new Benjamin which apparently will come with a 3-D security ribbon and a ton of other space age shit. Then (1862) vs. Now (2013): Via: The Wall Street Journal, Planet Oddity, and Wikipedia.