Sometimes when people get caught up in all the maker hype these, they forget that back in the day, people with real mad skills made awesome stuff. While it's always great to make stuff, before the days of Arduinos and PWM controlled of servos, people used to create mechanical masterpieces. More intricate than the geekiest algorithm is the design of a spring loaded, hidden compartment. This cabinet is one of the finest examples I've seen in a while.
The Berlin Secretary Cabinet was built in the 1700s in Germany and was owned by King Frederick William II. It is on display at the Metropolitan Museum of Art in the Extravagant Inventions exhibition. It was built by Abraham Roentgen (1711–1793) and his son David (1743–1807). Nicely done gents!