Welcome to the Chocolate Museum in Cologne, a place where a very ordinary treat turns out to have an extraordinary biography. The museum stands in the Rheinauhafen, the old harbor district on the Rhine, and it has been one of the city's best-known landmarks since it opened in 1993. Inside, you follow a journey through the 5,000-year cultural history of cocoa and chocolate, spread over three floors. It begins in ancient America and ends with the sweet temptations of our own time. Along the way you meet a tropical greenhouse, a working glass chocolate factory, a golden fountain, and a collection of historic objects from all over the world. Over the next few sections we will look at the man behind the idea, the building that houses it, the story of cocoa itself, and the machinery and tastes that bring it to life. Take a deep breath, because chocolate is already in the air.