The Marine National Park, the only marine sanctuary in India, is near Jamnagar, on the coral reef island of Pirotan. Jamnagar is well known for its four marble Jain temples: Vardhman Shah's Temple, Raisi Shah's Temple, Sheth's Temple, and Vasupujya Swami's Temple; all built between 1574 and 1622. The Bala Hanuman Temple in Jamnagar is listed in The Guinness Book of World Records for the longest continuous chanting of "Ram Dhun" (since 1 August 1964). Also in the Guinness Book of Records is the world's largest Rotla, which weighed 63.99 kg (141 lb 1 oz) and was made by the Shree Jalarm Mandir Jirnodhar Samitee organisation at the Jalaram Temple, Jamnagar, on 15 January 2005.