comedy and royalty. this was for long periods of history a place where the north was governed from, certainly where yorkshire was governed from, and sometimes where england was governed from. it has a very, very long, very eventful, sometimes tragic history. the stone tower, built for henry iii in the 13th century, is the largest remaining part of york castle. hundreds of years in all weathers, sun and snow, just like today, have taken their toll. so, to conserve the walls, every single stone has been tested as part of the major conservation works here. you can see the pink stone there and the pink is actually fire damage from the catastrophic fire that occurred in 1684. these walkways, part of the £5 million project, will offer visitors views not seen since the floors were destroyed by that major fire when a ceremonial cannon salute for st george�*s day went horribly wrong. and they also allow access to some fascinating stories.