sentences:  In the 1840s, plans were put in place for a new building to house the RSA.The noted Scottish architect William Henry Playfair was commissioned to prepare designs, and on 30 August 1850, Prince Albert laid the foundation stone.The building was originally divided along the middle, with the east half housing the exhibition galleries of the RSA, and the western half containing the new National Gallery of Scotland, formed from the collection of the Royal Institution.