Where to find the database characterset in the dictionary

SQL> select value$ from sys.props$ where name = 'NLS_CHARACTERSET';

 VALUE$
 --------------------------------------------------------------------------------
 WE8MSWIN1252

 SQL> select * from nls_database_parameters WHERE PARAMETER='NLS_CHARACTERSET';

 PARAMETER                      VALUE
 ------------------------------ ----------------------------------------
 NLS_CHARACTERSET               WE8MSWIN1252