sophisticated surface/subsurface hydraulic systems, some of which are working today. The south contains a man-made reservoir; these were extensively used from the previous capital of the dry zone of Sri Lanka. Five gates were placed at entrances. The more elaborate western gate is thought to have been reserved for the royals. Frescoes John Still in 1907 wrote, "The whole face of the hill appears to have been a gigantic picture gallery... the largest picture in the world perhaps". The paintings would have covered most of the western face of the rock, an area long and high. There are references in the graffiti to 500 ladies in these paintings. However, most have been lost forever. More frescoes, different from those on the rock face, can be seen elsewhere, for example on the ceiling of the location called the "Cobra Hood Cave". Although the frescoes are classified as in the Anuradhapura period, the painting style is considered unique; the line and style of application of the paintings differing from Anuradhapura paintings. The lines are painted in a form which enhances the sense of volume of the figures. The paint has been applied in sweeping strokes, using more pressure on one side, giving the effect of a deeper colour tone towards the edge. Other paintings of the Anuradhapura period contain similar approaches to painting, but do not have the sketchy lines of the Sigiriya style, having a distinct artists' boundary line. The true identity of the ladies in these paintings still has not been confirmed. There are various ideas about their identity. Some believe that they are the ladies of the kings while others think that they are women taking part in religious observances. These pictures have a close resemblance to paintings seen in the Ajanta Caves in India. 1967 vandalism incident On 14 October 1967, an incident of vandalism took place where paint was splashed on the frescoes. Luciano Maranzi, an expert trained at the International Centre for the Study of the Preservation and Restoration of Cultural Property in Rome, assisted the restoration, which took until 11 April 1968. It was considered the most challenging effort undertaken by the Chemical Preservation Division of the Department of Archaeology. There is continued concern that the original colours of the frescoes are fading, with a report presented in 2010 suggesting that the 22 frescoes have been fading since 1930. Mirror wall Originally this wall was