In the early 1820s, Charles Fredrick de Brocktorff, a German artist, was commissioned to make a series of watercolours on the Maltese islands. Nineteen of these watercolours depict the archaeological remains of the Igantija temple and the nearby stone circle which had just been excavated by Col. Otto Bayer. The album containing these watercolours is zealously kept at the National Library of Malta and permission to view them is only given on special rare occassions.