<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> 023
<NAME> NUVEEN CALIFORNIA INSURED MUNICIPAL BOND FUND - CLASS C
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> FEB-28-2001
<PERIOD-START> MAR-01-2000
<PERIOD-END> AUG-31-2000
<INVESTMENTS-AT-COST> 214997
<INVESTMENTS-AT-VALUE> 227873
<RECEIVABLES> 8753
<ASSETS-OTHER> 338
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 236964
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 799
<TOTAL-LIABILITIES> 799
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 225485
<SHARES-COMMON-STOCK> 673
<SHARES-COMMON-PRIOR> 647
<ACCUMULATED-NII-CURRENT> 175
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (2372)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 12877
<NET-ASSETS> 236165
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 6953
<OTHER-INCOME> 0
<EXPENSES-NET> 908
<NET-INVESTMENT-INCOME> 6045
<REALIZED-GAINS-CURRENT> (163)
<APPREC-INCREASE-CURRENT> 10072
<NET-CHANGE-FROM-OPS> 15954
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 169
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 142
<NUMBER-OF-SHARES-REDEEMED> 127
<SHARES-REINVESTED> 11
<NET-CHANGE-IN-ASSETS> 7873
<ACCUMULATED-NII-PRIOR> 190
<ACCUMULATED-GAINS-PRIOR> (2209)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 635
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 918
<AVERAGE-NET-ASSETS> 7259
<PER-SHARE-NAV-BEGIN> 10.13
<PER-SHARE-NII> .24
<PER-SHARE-GAIN-APPREC> .44
<PER-SHARE-DIVIDEND> (.24)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.57
<EXPENSE-RATIO> 1.41
</TABLE>
