<Table> <Tr> <Th_colspan="2"> Philadelphia 76ers </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> </Td> <Td> 2018--19 Philadelphia 76ers season </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Conference </Th> <Td> Eastern </Td> </Tr> <Tr> <Th> Division </Th> <Td> Atlantic </Td> </Tr> <Tr> <Th> Founded </Th> <Td> 1946 </Td> </Tr> <Tr> <Th> History </Th> <Td> Syracuse Nationals 1946--1963 Philadelphia 76ers 1963--present </Td> </Tr> <Tr> <Th> Arena </Th> <Td> Wells Fargo Center </Td> </Tr> <Tr> <Th> Location </Th> <Td> Philadelphia, Pennsylvania </Td> </Tr> <Tr> <Th> Team colors </Th> <Td> Blue, red, navy, silver, white </Td> </Tr> <Tr> <Th> Main sponsor </Th> <Td> StubHub </Td> </Tr> <Tr> <Th> CEO </Th> <Td> Scott O'Neil </Td> </Tr> <Tr> <Th> General manager </Th> <Td> Vacant </Td> </Tr> <Tr> <Th> Head coach </Th> <Td> Brett Brown </Td> </Tr> <Tr> <Th> Ownership </Th> <Td> Joshua Harris </Td> </Tr> <Tr> <Th> Affiliation (s) </Th> <Td> Delaware Blue Coats </Td> </Tr> <Tr> <Th> Championships </Th> <Td> 3 (1955, 1967, 1983) </Td> </Tr> <Tr> <Th> Conference titles </Th> <Td> 9 (1950, 1954, 1955, 1967, 1977, 1980, 1982, 1983, 2001) </Td> </Tr> <Tr> <Th> Division titles </Th> <Td> 5 (1977, 1978, 1983, 1990, 2001) </Td> </Tr> <Tr> <Th> Retired numbers </Th> <Td> 10 (3, 4, 6, 10, 13, 15, 24, 32, 34, MIC) </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.nba.com/sixers </Td> </Tr> <Tr> <Th_colspan="2"> Uniforms </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> Home </Td> <Td> Away </Td> <Td> Third </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Philadelphia 76ers </Th> </Tr>

When was the last time the sixers won a championship