CHAPMAN AND CUTLER LLP
                             111 WEST MONROE STREET
                               CHICAGO, IL 60603


                                October 21, 2013


Securities and Exchange Commission
100 F Street, N.E.
Washington, D.C.  20549


          Re: Guggenheim Defined Portfolios, Series 1117 (the "Fund")
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Ladies and Gentlemen:

      Enclosed please find a copy of the Registration Statement on Form S-6 for
the registration under the Securities Act of 1933 of Units representing the
ownership of interests in the subject Fund. This Registration Statement is filed
on October 21, 2013, on behalf of Guggenheim Funds Distributors, LLC (the
"Sponsor").

      Inasmuch as the Fund is not yet operative, no filings have been required
under any of the acts administered by the Commission. Therefore, for purposes of
Securities Act Release No. 5196 there are no delinquencies to be reported or
other references to be made to filings under the 1934 Act.

      No notification of registration or Registration Statement under the
Investment Company Act of 1940 is currently being submitted to the Commission,
as the filings under the 1940 Act (File No. 811-03763) are intended to apply not
only to that series of the Fund, but to all "subsequent series" as well.

      The Fund is expected to be comprised of the following unit investment
trust: MLP & Energy Funds Portfolio, Series 4 (the "Trust"). The Trust will
invest in a portfolio of equity securities of master limited partnerships,
common shares of closed-end investment companies and shares of an
exchange-traded fund ("ETF"). As the ETF in which the Trust will invest is
structured as an open-end management company or unit investment trust, the Trust
is not eligible to go automatically effective in reliance on Rule 487 under the
Securities Act of 1933. The Trust may not rely on Rule 487 because paragraph
(b)(1) of Rule 487 requires that reliance upon the rule is conditioned upon the
registrant not engaging in the business of investing in open-end funds. Absent
paragraph (b)(1) of Rule 487, it would be our opinion that the Registration
Statement would not contain disclosures which would render it ineligible to
become effective pursuant to Rule 487.

      We are advised that the Sponsor proposes to deposit securities and to
activate the subject Fund on December 20, 2013.

      In the event that you may have any questions with regard hereto or if
there is any way which we can be of assistance, please do not hesitate to
telephone Eric F. Fess collect at (312) 845-3781 or Morrison C. Warren (312)
845-3484.

                                                               Very truly yours,


                                                      /s/ Chapman and Cutler LLP
                                                          CHAPMAN AND CUTLER LLP