With Art Deco turning 100, it's time to understand the key differences between two of the most iconic styles of the 20th century ...

Swirling patterns and flower forms create a flowing organic background. The image is given structure by a contrasting geometric line – the white outline of a circle in the background.

But there’s something more to this flower — something about the very nature of modern art and modern life. An abstract, geometric picture — black lines crossing at right angles against a ...