A blue and white Wedgwood jasper ware disc inserted into a marble chimneypiece on the first floor rear drawing room of 45 Merrion Square, Dublin now the offices of the Irish Architectural Archive. This hard stoneware pottery developed by Josiah Wedgwood in 1775 was soon used not for making cups or vases but to produce such items as plaques and discs which could be used in the decoration of rooms. So it is in two rooms at 45 Merrion Square where the plain white of the chimneypiece is relieved by bursts of vivid colour.