Royal Doulton 1815 Tapas Set Of 8 Olive Tray. 1815 was the year John Doulton founded his now world-famous pottery, and to commemorate that heritage, Royal Doulton has created the 1815 pattern. 1815 is a stylishly understated collection, full of vibrant colours. These Tapas Olive Trays have been rendered in porcelain with a simple, but striking silhouette and subtle clear glaze.