What's it worth? Value of money through time display

People have been using money for over four thousand years.
How much could they buy with their shekel, drachma, florin or penny?

A wall display showing different forms of money and its purchasing power that have been used throughout history, organised chronologically.

Any suggestions/improvements/complaints please do comment and I will update it for future editions.

The font is OpenDyslexic - Free, OpenSource Dyslexia Typeface
http://opendyslexic.org/