Sonar Kella (Bengali: সোনার কেল্লা), also Shonar Kella is a 1971 mystery novel[1] by Bengali writer and filmmaker Satyajit Ray.[2] In 1974, Ray directed a film adaption of the book, also named Sonar Kella, starring Soumitra Chatterjee, Santosh Dutta, Siddartha Chatterjee and Kushal Chakraborty.[2] The movie was released in the United States as The Golden Fortress