GeoGraph - photograph every grid square

Cardiff was once the world's biggest export port for coal. It's only fitting that the architecture reflect the wealth that the export brought to the area. Built between 1883 and 1886 to the designs of James, Seward and Thomas, this was where many of the most lucrative deals in the world were being made in the early 20th century - indeed, the UK's first million pound cheque was cut in this building.

The millionaires have long since left along with the coal trade. More recently, the Coal Exchange became known as a concert and function venue. However, by October 2007 major renovation was required and it closed. It is hoped to open again in 2009 but this time as luxury flats as well as being a concert venue.