The Hindu, 8 June 2014 - Sulabh International Museum of Toilets highlights the 4,500-year history of sanitation through a varied collection of posters, photographs and life-sized replicas of toilets used in different parts of the world during different time periods. Portable toilets are also on display, and toilet humor gets a nod as well. For example, someone once posted this public notice: “Warning! Due to industrial action, this toilet will be closed tomorrow so do as much as you can today.”