1
                                                                      Exhibit 16


                       NUVEEN FLAGSHIP MULTISTATE TRUST IV

                                -----------------

                                POWER OF ATTORNEY

                                -----------------


KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a trustee of the
above-referenced trusts, hereby constitutes and appoints TIMOTHY R.
SCHWERTFEGER, ANTHONY T. DEAN, ALAN G. BERKSHIRE, and GIFFORD R. ZIMMERMAN, and
each of them (with full power to each of them to act alone) her true and lawful
attorney-in-fact and agent, for her on her behalf and in her name, place and
stead, in any and all capacities, to sign, execute and affix her seal thereto
and file one or more Registration Statements on Form N-14 under the Securities
Act of l933, as amended, and the Investment Company Act of l940, as amended,
including any amendment or amendments thereto, with all exhibits, and any and
all other documents required to be filed with any regulatory authority, federal
or state, relating to the reorganization, without limitation, granting unto said
attorneys, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the premises
in order to effectuate the same as fully to all intents and purposes as she
might or could do if personally present, hereby ratifying and confirming all
that said attorneys-in-fact and agents, or any of them, may lawfully do or cause
to be done by virtue hereof.

IN WITNESS WHEREOF, the undersigned trustee of the above-referenced organization
has hereunto set her hand this 18th day of December, 1998.



                                                    /s/ Anne E. Impellizzeri
                                                    ----------------------------
                                                    Anne E. Impellizzeri



STATE OF ILLINOIS             )
                              )SS
COUNTY OF COOK                )


On this 18th day of December, 1998, personally appeared before me, a Notary
Public in and for said County and State, the person named above who is known to
me to be the person whose name and signature is affixed to the foregoing Power
of Attorney and who acknowledged the same to be her voluntary act and deed for
the intent and purposes therein set forth.

"OFFICIAL SEAL"
Virginia L. Corcoran                             /s/ Virginia L. Corcoran
Notary Public, State of Illinois                 ------------------------------
My Commission Expires:  10/27/01                 Notary Public

   2


                       NUVEEN FLAGSHIP MULTISTATE TRUST IV



                                -----------------

                                POWER OF ATTORNEY

                                -----------------




KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a trustee of the
above-referenced trusts, hereby constitutes and appoints TIMOTHY R.     
SCHWERTFEGER, ANTHONY T. DEAN, ALAN G. BERKSHIRE, and  GIFFORD R. ZIMMERMAN,
and each of them (with full power to each of them to act alone) her true and
lawful attorney-in-fact and agent, for her on her behalf and in her name, place
and stead, in any and all capacities, to sign, execute and affix her seal
thereto and file one or more Registration Statements on Form N-14 under the
Securities Act of l933, as amended, and the Investment Company Act of l940, as
amended, including any amendment or amendments thereto, with all exhibits, and
any and all other documents required to be filed with any regulatory authority,
federal or state, relating to the reorganization, without limitation, granting
unto said attorneys, and each of them, full power and authority to do and
perform each and every act and thing requisite and necessary to be done in and
about the premises in order to effectuate the same as fully to all intents and
purposes as she might or could do if personally present, hereby ratifying and
confirming all that said attorneys-in-fact and agents, or any of them, may
lawfully do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, the undersigned trustee of the above-referenced organization
has hereunto set her hand this 18th day of December, 1998.




                                               /s/ Judith M. Stockdale
                                               ---------------------------------
                                               Judith M. Stockdale



STATE OF ILLINOIS          )
                           )SS
COUNTY OF COOK             )

On this 18th day of December, 1998, personally appeared before me, a Notary
Public in and for said County and State, the person named above who is known to
me to be the person whose name and signature is affixed to the foregoing Power
of Attorney and who acknowledged the same to be her voluntary act and deed for
the intent and purposes therein set forth.

"OFFICIAL SEAL"
Virginia L. Corcoran                              /s/ Virginia L. Corcoran
Notary Public, State of Illinois                  ------------------------------
My Commission Expires:  10/27/01                  Notary Public



   3

                       NUVEEN FLAGSHIP MULTISTATE TRUST IV


                                -----------------

                                POWER OF ATTORNEY

                                -----------------


KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a trustee of the  
above-referenced trusts, hereby constitutes and appoints TIMOTHY R.
SCHWERTFEGER, ANTHONY T. DEAN, ALAN G. BERKSHIRE, and GIFFORD R. ZIMMERMAN, and
each of them (with full power to each of them to act alone) his true and lawful
attorney-in-fact and agent, for him on his behalf and in his name, place and
stead, in any and all capacities, to sign, execute and affix his seal thereto
and file one or more Registration Statements on Form N-14 under the Securities
Act of l933, as amended, and the Investment Company Act of l940, as amended,
including any amendment or amendments thereto, with all exhibits, and any and
all other documents required to be filed with any regulatory authority, federal
or state, relating to the reorganization, without limitation, granting unto
said attorneys, and each of them, full power and authority to do and perform
each and every act and thing requisite and necessary to be done in and about
the premises in order to effectuate the same as fully to all intents and
purposes as he might or could do if personally present, hereby  ratifying and
confirming all that said attorneys-in-fact and agents, or any of them, may
lawfully do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, the undersigned trustee of the above-referenced organization
has hereunto set his hand this 18th day of December, 1998.



                                              /s/ Robert P. Bremner
                                              ----------------------------------
                                              Robert P. Bremner



STATE OF ILLINOIS          )
                           )SS
COUNTY OF COOK             )

On this 18th day of December, 1998, personally appeared before me, a Notary
Public in and for said County and State, the person named above who is known to
me to be the person whose name and signature is affixed to the foregoing Power
of Attorney and who acknowledged the same to be his voluntary act and deed for
the intent and purposes therein set forth.

"OFFICIAL SEAL"
Virginia L. Corcoran                              /s/ Virginia L. Corcoran
Notary Public, State of Illinois                  ------------------------------
My Commission Expires:  10/27/01                  Notary Public



   4
                       NUVEEN FLAGSHIP MULTISTATE TRUST IV


                                -----------------

                                POWER OF ATTORNEY

                                -----------------


KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a trustee of the
above-referenced trusts, hereby constitutes and appoints TIMOTHY R.
SCHWERTFEGER, ANTHONY T. DEAN, ALAN G. BERKSHIRE, and GIFFORD R. ZIMMERMAN, and
each of them (with full power to each of them to act alone) his true and lawful
attorney-in-fact and agent, for him on his behalf and in his name, place and
stead, in any and all capacities, to sign, execute and affix his seal thereto
and file one or more Registration Statements on Form N-14 under the Securities
Act of l933, as amended, and the Investment Company Act of l940, as amended,
including any amendment or amendments thereto, with all exhibits, and any and
all other documents required to be filed with any regulatory authority, federal
or state, relating to the reorganization, without limitation, granting unto said
attorneys, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the premises
in order to effectuate the same as fully to all intents and purposes as he might
or could do if personally present, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or any of them, may lawfully do or cause to be
done by virtue hereof.

IN WITNESS WHEREOF, the undersigned trustee of the above-referenced organization
has hereunto set his hand this 18th day of December, 1998.





                                             /s/ Lawrence H. Brown
                                             -----------------------------------
                                             Lawrence H. Brown





STATE OF ILLINOIS           )
                            )SS
COUNTY OF COOK              )

On this 18th day of December, 1998, personally appeared before me, a Notary
Public in and for said County and State, the person named above who is known to
me to be the person whose name and signature is affixed to the foregoing Power
of Attorney and who acknowledged the same to be his voluntary act and deed for
the intent and purposes therein set forth.

"OFFICIAL SEAL"
Virginia L. Corcoran                              /s/ Virginia L. Corcoran
Notary Public, State of Illinois                  ------------------------------
My Commission Expires:  10/27/01                  Notary Public





   5

                       NUVEEN FLAGSHIP MULTISTATE TRUST IV


                                -----------------

                                POWER OF ATTORNEY

                                -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a trustee of the
above-referenced trusts, hereby constitutes and appoints TIMOTHY R.
SCHWERTFEGER, ALAN G. BERKSHIRE, and GIFFORD R. ZIMMERMAN, and each of them
(with full power to each of them to act alone) his true and lawful
attorney-in-fact and agent, for him on his behalf and in his name, place and
stead, in any and all capacities, to sign, execute and affix his seal thereto
and file one or more Registration Statements on Form N-14 under the Securities
Act of l933, as amended, and the Investment Company Act of l940, as amended,
including any amendment or amendments thereto, with all exhibits, and any and
all other documents required to be filed with any regulatory authority, federal
or state, relating to the reorganization, without limitation, granting unto said
attorneys, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the premises
in order to effectuate the same as fully to all intents and purposes as he might
or could do if personally present, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or any of them, may lawfully do or cause to be
done by virtue hereof.

IN WITNESS WHEREOF, the undersigned trustee of the above-referenced organization
has hereunto set his hand this 18th day of December, 1998.



                                                  /s/ Anthony T. Dean
                                                  ------------------------------
                                                  Anthony T. Dean



STATE OF ILLINOIS             )
                              )SS
COUNTY OF COOK                )


On this 18th day of December, 1998, personally appeared before me, a Notary
Public in and for said County and State, the person named above who is known to
me to be the person whose name and signature is affixed to the foregoing Power
of Attorney and who acknowledged the same to be his voluntary act and deed for
the intent and purposes therein set forth.

"OFFICIAL SEAL"
Virginia L. Corcoran                              /s/ Virginia L. Corcoran
Notary Public, State of Illinois                  ------------------------------
My Commission Expires:  10/27/01                  Notary Public
                                 



   6
                       NUVEEN FLAGSHIP MULTISTATE TRUST IV



                                -----------------

                                POWER OF ATTORNEY

                                -----------------



KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a trustee of the
above-referenced trusts, hereby constitutes and appoints TIMOTHY R.
SCHWERTFEGER, ANTHONY T. DEAN, ALAN G. BERKSHIRE, and GIFFORD R. ZIMMERMAN, and
each of them (with full power to each of them to act alone) his true and lawful
attorney-in-fact and agent, for him on his behalf and in his name, place and
stead, in any and all capacities, to sign, execute and affix his seal thereto
and file one or more Registration Statements on Form N-14 under the Securities
Act of l933, as amended, and the Investment Company Act of l940, as amended,
including any amendment or amendments thereto, with all exhibits, and any and
all other documents required to be filed with any regulatory authority, federal
or state, relating to the reorganization, without limitation, granting unto said
attorneys, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the premises
in order to effectuate the same as fully to all intents and purposes as he might
or could do if personally present, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or any of them, may lawfully do or cause to be
done by virtue hereof.

IN WITNESS WHEREOF, the undersigned trustee of the above-referenced organization
has hereunto set his hand this 18th day of December, 1998.



                                                  /s/ Peter R. Sawers
                                                  ------------------------------
                                                  Peter R. Sawers




STATE OF ILLINOIS             )
                              )SS
COUNTY OF COOK                )

On this 18th day of December, 1998, personally appeared before me, a Notary
Public in and for said County and State, the person named above who is known to
me to be the person whose name and signature is affixed to the foregoing Power
of Attorney and who acknowledged the same to be his voluntary act and deed for
the intent and purposes therein set forth.

"OFFICIAL SEAL"
Virginia L. Corcoran                              /s/ Virginia L. Corcoran
Notary Public, State of Illinois                  ------------------------------
My Commission Expires:  10/27/01                  Notary Public


   7






                       NUVEEN FLAGSHIP MULTISTATE TRUST IV



                                -----------------

                                POWER OF ATTORNEY

                                -----------------


KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a trustee of the
above-referenced trusts, hereby constitutes and appoints TIMOTHY R.
SCHWERTFEGER, ANTHONY T. DEAN, ALAN G. BERKSHIRE, and GIFFORD R. ZIMMERMAN, and
each of them (with full power to each of them to act alone) his true and lawful
attorney-in-fact and agent, for him on his behalf and in his name, place and
stead, in any and all capacities, to sign, execute and affix his seal thereto
and file one or more Registration Statements on Form N-14 under the Securities
Act of l933, as amended, and the Investment Company Act of l940, as amended,
including any amendment or amendments thereto, with all exhibits, and any and
all other documents required to be filed with any regulatory authority, federal
or state, relating to the reorganization, without limitation, granting unto said
attorneys, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the premises
in order to effectuate the same as fully to all intents and purposes as he might
or could do if personally present, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or any of them, may lawfully do or cause to be
done by virtue hereof.

IN WITNESS WHEREOF, the undersigned trustee of the above-referenced organization
has hereunto set his hand this 18th day of December, 1998.



                                           /s/ William J. Schneider
                                           -------------------------------------
                                           William J. Schneider



STATE OF ILLINOIS          )
                           )SS
COUNTY OF COOK             )

On this 18th day of December, 1998, personally appeared before me, a Notary
Public in and for said County and State, the person named above who is known to
me to be the person whose name and signature is affixed to the foregoing Power
of Attorney and who acknowledged the same to be his voluntary act and deed for
the intent and purposes therein set forth.

"OFFICIAL SEAL"
Virginia L. Corcoran                              /s/ Virginia L. Corcoran
Notary Public, State of Illinois                  ------------------------------
My Commission Expires:  10/27/01                  Notary Public



   8
                       NUVEEN FLAGSHIP MULTISTATE TRUST IV



                                -----------------

                                POWER OF ATTORNEY

                                -----------------


KNOW ALL MEN BY THESE PRESENTS, that the undersigned, a trustee of the  
above-referenced trusts, hereby constitutes and appoints ANTHONY T. DEAN, ALAN
G. BERKSHIRE, and GIFFORD R. ZIMMERMAN, and each  of them (with full power to
each of them to act alone) his true and lawful attorney-in-fact and agent, for
him on his behalf and in his name, place and stead, in any and all capacities,
to sign, execute and affix his seal thereto and file one or more Registration
Statements on Form N-14 under the Securities Act of l933, as amended, and the
Investment Company Act of l940, as amended, including any amendment or
amendments thereto, with all exhibits, and any and all other documents required
to be filed with any regulatory authority, federal or state, relating to the
reorganization, without limitation, granting unto said attorneys, and each of
them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises in order to
effectuate the same as fully to all intents and purposes as he might or could
do if personally present, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or any of them, may lawfully do or cause to be
done by virtue hereof.

IN WITNESS WHEREOF, the undersigned trustee of the above-referenced organization
has hereunto set his hand this 18th day of December, 1998.



                                                  /s/ Timothy R. Schwertfeger
                                                  ------------------------------
                                                  Timothy R. Schwertfeger



STATE OF ILLINOIS          )
                           )SS
COUNTY OF COOK             )


On this 18th day of December, 1998, personally appeared before me, a Notary
Public in and for said County and State, the person named above who is known to
me to be the person whose name and signature is affixed to the foregoing Power
of Attorney and who acknowledged the same to be his voluntary act and deed for
the intent and purposes therein set forth.

"OFFICIAL SEAL"
Virginia L. Corcoran                              /s/ Virginia L. Corcoran
Notary Public, State of Illinois                  ------------------------------
My Commission Expires:  10/27/01                  Notary Public