Lord Castlereagh, was one of the most successful and controversial political figures his day. He was a master diplomat, noted as the architect of the 1801 Act of Union that brought Ireland under the control of Westminster, and as a key figure in the defeat of Napoleon. You have probably come across him when you studied the Congress of Vienna.You may also know about his terrible death.
Click here for a super BBC audio slideshow on his life by Brian Henry Martin and Ian Knox. They have also collaborated on a documentary that tries to understand the brutal actions of this flawed and forgotten political colossus.