<Tr> <Th> Type </Th> <Td> Cultural </Td> </Tr> <Tr> <Th> Criteria </Th> <Td> </Td> </Tr> <Tr> <Th> Designated </Th> <Td> 1993 (17th session) </Td> </Tr> <Tr> <Th> Reference no . </Th> <Td> 233 </Td> </Tr>

When was qutub minar granted world heritage site