<Table> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> First Kindergarten </Td> </Tr> <Tr> <Td_colspan="2"> U.S. National Register of Historic Places </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Location </Th> <Td> 919 Charles St . Watertown, Wisconsin </Td> </Tr> <Tr> <Th> NRHP reference #</Th> <Td> 72000055 </Td> </Tr> <Tr> <Th> Added to NRHP </Th> <Td> February 23, 1972 </Td> </Tr> </Table> <Tr> <Td_colspan="2"> First Kindergarten </Td> </Tr> <Tr> <Td_colspan="2"> U.S. National Register of Historic Places </Td> </Tr>

When was the first kindergarten in the united states opened and by whom