The Pierhead Building

The Pierhead Building (Welsh: Adeilad y Pierhead) is a Grade I listed building of the National Assembly for Wales in Cardiff Bay, Wales.

It stands as one of the city of Cardiff's most familiar landmarks and was built as the headquarters for the Bute Dock Company.

The clock on the building is unofficially known as the "Baby Big Ben" or the "Big Ben of Wales", and also serves as a Welsh history museum.

The Pierhead Building is part of the estate of the National Assembly for Wales, which also includes the Senedd and Ty Hywel.

The building was built in 1897 and designed by the English architect William Frame. It was a replacement for the headquarters of the Bute Dock Company which burnt down in 1892. Frame's mentor was William Burges, with whom Frame worked on the rebuilding of Cardiff Castle and Castell Coch until Burges's death in 1881.

The Bute Dock Company was renamed the Cardiff Railway Company in 1897. A coat of arms on the building's façade bears the company's motto "wrth ddŵr a thân" (by water and fire) encapsulating the elements creating the steam power which transformed Wales.

The Pierhead became the administrative office for the Port of Cardiff in 1947.