Dominic has put up some great photographs of the stunning paintings and statues of this temple’s image house. The artwork was carried out in the 1920s by an artist called Sarlis Master who I think is still unparalleled in this century.
For the temple’s location, here’s the Wikimapia link.
I couldn’t find much about Isipathanaramaya online. The only bit I found was that the temple was built in memory of Edward Henry Pedris who was executed by the British in 1915 in what seems to have been a bungled application of emergency regulations. A grim warning about today perhaps. If you got better links or information, the comment box is below.