The financial section on yahoo.co.uk can chart historic prices of major world equities & indicies. Otherwise speak to a reputable stockbroking firm - they can provide a lot of vital info for serious investors. You could also check out they used to have fantastic historical info incl financials on just about every worthwhile equity worldwide, but I think all their useful info is by subscription now. Have a look.
You can gwt a graph of most share prices for about 5 years back. Be aware that there may have been rights issues and share splits that can distort the current/old price.