<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
This schedule contains Summary Financial Information extracted from the Form
N-SAR and the financial statements and is qualified in its entirety by
references to such documents.
</LEGEND>
<SERIES>
   <NUMBER> 072
   <NAME> NUVEEN FLAGSHIP PENN MUNICIPAL BOND FUND - CLASS B
<MULTIPLIER> 1000

<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAY-31-2000
<PERIOD-START>                             JUN-01-1999
<PERIOD-END>                               MAY-31-2000
<INVESTMENTS-AT-COST>                           128867
<INVESTMENTS-AT-VALUE>                          122585
<RECEIVABLES>                                     2321
<ASSETS-OTHER>                                     420
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  125326
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          492
<TOTAL-LIABILITIES>                                492
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        133482
<SHARES-COMMON-STOCK>                              831
<SHARES-COMMON-PRIOR>                              761
<ACCUMULATED-NII-CURRENT>                        (179)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         (2187)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        (6282)
<NET-ASSETS>                                    124834
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 8606
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    1551
<NET-INVESTMENT-INCOME>                           7055
<REALIZED-GAINS-CURRENT>                        (2185)
<APPREC-INCREASE-CURRENT>                      (12873)
<NET-CHANGE-FROM-OPS>                           (8003)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          371
<DISTRIBUTIONS-OF-GAINS>                            22
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                            290
<NUMBER-OF-SHARES-REDEEMED>                        232
<SHARES-REINVESTED>                                 12
<NET-CHANGE-IN-ASSETS>                         (28209)
<ACCUMULATED-NII-PRIOR>                              1
<ACCUMULATED-GAINS-PRIOR>                          372
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              785
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1590
<AVERAGE-NET-ASSETS>                              8384
<PER-SHARE-NAV-BEGIN>                            10.47
<PER-SHARE-NII>                                    .42
<PER-SHARE-GAIN-APPREC>                         (1.03)
<PER-SHARE-DIVIDEND>                             (.43)
<PER-SHARE-DISTRIBUTIONS>                        (.03)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.40
<EXPENSE-RATIO>                                   1.86


</TABLE>