By Mary O'connor For The Daily Mail
Published: 23:23 GMT, 31 January 2019 | Updated: 02:06 GMT, 1 February 2019
The Prince of Wales has backed plans to preserve rarely-seen watercolours that show the world before photography.
A charity aims to scan and digitise tens of thousands of ‘unique and utterly irreplaceable’ paintings from a 150-year period and present them in a free online database.
Unlike oil paintings, watercolours are vulnerable to fading in daylight and can also be damaged by changes in temperature and humidity, so many have to be kept locked away from public