<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> 021
<NAME> NUVEEN FLAGSHIP COLORADO MUNICIPAL BOND FUND - CLASS A
<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> 42787
<INVESTMENTS-AT-VALUE> 41973
<RECEIVABLES> 667
<ASSETS-OTHER> 1175
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 43815
<PAYABLE-FOR-SECURITIES> 2062
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 318
<TOTAL-LIABILITIES> 2380
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 43597
<SHARES-COMMON-STOCK> 3416
<SHARES-COMMON-PRIOR> 3670
<ACCUMULATED-NII-CURRENT> (41)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1307)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (814)
<NET-ASSETS> 41435
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2732
<OTHER-INCOME> 0
<EXPENSES-NET> 602
<NET-INVESTMENT-INCOME> 2130
<REALIZED-GAINS-CURRENT> (1307)
<APPREC-INCREASE-CURRENT> (3795)
<NET-CHANGE-FROM-OPS> (2972)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1800
<DISTRIBUTIONS-OF-GAINS> 95
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 497
<NUMBER-OF-SHARES-REDEEMED> 819
<SHARES-REINVESTED> 68
<NET-CHANGE-IN-ASSETS> (5507)
<ACCUMULATED-NII-PRIOR> 1
<ACCUMULATED-GAINS-PRIOR> 116
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 242
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 606
<AVERAGE-NET-ASSETS> 35696
<PER-SHARE-NAV-BEGIN> 10.68
<PER-SHARE-NII> .49
<PER-SHARE-GAIN-APPREC> (1.14)
<PER-SHARE-DIVIDEND> (.50)
<PER-SHARE-DISTRIBUTIONS> (.03)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.50
<EXPENSE-RATIO> 1.25
</TABLE>
