Cardiff in making iron and later steel, brought to the sea by packhorse from Merthyr Tydfil. This was first achieved by the construction of a long canal from Merthyr (510 feet above sea-level) to the Taff Estuary at Cardiff. Eventually the Taff Vale Railway replaced the canal barges and massive marshalling yards sprang up as new docks were developed in Cardiff – all prompted by the soaring worldwide demand for coal from the South Wales valleys. At its peak, Cardiff's port area, known as Tiger Bay, became the busiest port in the world and – for some time – the world's
Cardiff Bay Opera House Inner Harbour, Cardiff Bay. An international design competition was held and was eventually won by the Iraqi-born architect Zaha Hadid. The Hadid design was called the Crystal Necklace by some in the media. However, the project failed to win financial support from the Millennium Commission, the body which distributed funds from the UK National Lottery. An international design competition was established by the Cardiff Bay Opera House Trust to decide on the architect for the project. The competition would eventually be in two rounds. The first round of the competition attracted 268 international competitors; it was won by Iraq-born architect