Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_58 (primary_conference VARCHAR, founded VARCHAR, affiliation VARCHAR)

### Question ###
What is the primary conference that was founded before 1866 and has an affiliation of private/catholic?

### Accurate SQL ###

SELECT primary_conference FROM table_name_58 WHERE founded < 1866 AND affiliation = "private/catholic"