Abstraction

In the 1912 Lucian Bernhard poster for Stiller shoes above, we see that the poster is mainly to show the product.  All other elements that may have been in the poster, possibly a woman to wear the shoes, have been stripped away so to simply show what the company is there to sell.  This idea would then be taken a few steps further, shown below by the J.P. Morgan Chase symbol, which takes the idea that the bank is  the shapes which form an octagon around a square, you, protecting you from theft, the main thing people look for in a bank.  The idea takes simplicity and pushes it forward to total abstraction of an idea.