Complex sentence: The east facing door has on either side the remains of what must have been elegent lintel decoration, and a open hall type of pillared extension containing a large recumbent image of Nandi (bull) which faces the shrine.
Split into simpler sentences: The east facing door has on either side the remains of what must have been elegent lintel decorations. There is an open hall type pillared extension here containing a large recumbent image of Nandi (bull) which faces the shrine.