The previous series of Royal Bank of Scotland notes, originally issued in 1987, remains in circulation, although it is now in the process of being replaced by polymer notes. On the front of each note is a picture of Lord Ilay (1682–1761), the first governor of the bank, based on a portrait painted in 1744 by the Edinburgh artist Allan Ramsay. The front of the notes also feature an engraving of the bank's former headquarters in St. Andrew Square, Edinburgh. The background graphic on both sides of the notes is a radial star design which is based on the ornate ceiling of the banking hall in the old headquarters building. On the back of the notes are images of Scottish castles, with a different castle for each denomination.