                                       
 The T__er of L_ndon w_s a f__tress,   
                                       
a r__al pala_e, a pri_on. N__ it's     
                                       
a mus__m. St.P__l's Ca__edral is the   
                                       
gr__test w__k of the ar__etect S__     
                                       
Christo__er Wren.                      
                                       
