Nuveen Insured CA Tax Free Advantage Municipal Fund 2
                              333 West Wacker Drive
                             Chicago, Illinois 60606

                                December 2, 2004

U.S. Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549

Re: Nuveen Insured CA Tax Free Advantage Municipal Fund 2 (CIK: 0001218079)
    Request for Withdrawal of Registration Statement on Form N-2
    File Nos. 333-103079, 811-21304

Ladies and Gentlemen:

     On February 11, 2003, Nuveen Insured CA Tax Free Advantage Municipal Fund 2
(the "Registrant") filed a registration statement on Form N-2 relating to the
registration of common shares of beneficial interest of Nuveen Insured CA Tax
Free Advantage Municipal Fund 2 (accession number 0000950131-03-000519). The
registration statement has not yet become effective.

     Pursuant to Rule 477(a) under the Securities Act of 1933, the Registrant
hereby requests the withdrawal of the above mentioned Form N-2 for Nuveen
Insured CA Tax Free Advantage Municipal Fund 2.

                                        Sincerely,

                                        Nuveen Insured CA Tax Free Advantage
                                        Municipal Fund 2
                                        (Registrant)


                                        By: /s/ Jessica R. Droeger
                                            ------------------------------------
                                            Jessica R. Droeger
                                            Vice President and Secretary