<Table> <Tr> <Th_colspan="2"> Detroit Pistons </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> </Td> <Td> 2018--19 Detroit Pistons 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> Central </Td> </Tr> <Tr> <Th> Founded </Th> <Td> 1941 </Td> </Tr> <Tr> <Th> History </Th> <Td> Fort Wayne Zollner Pistons 1941--1948 Fort Wayne Pistons 1948--1957 Detroit Pistons 1957--present </Td> </Tr> <Tr> <Th> Arena </Th> <Td> Little Caesars Arena </Td> </Tr> <Tr> <Th> Location </Th> <Td> Detroit, Michigan </Td> </Tr> <Tr> <Th> Team colors </Th> <Td> Royal blue, red, chrome, navy blue, white </Td> </Tr> <Tr> <Th> Main sponsor </Th> <Td> Flagstar Bank </Td> </Tr> <Tr> <Th> President </Th> <Td> Vacant </Td> </Tr> <Tr> <Th> General manager </Th> <Td> Vacant </Td> </Tr> <Tr> <Th> Head coach </Th> <Td> Dwane Casey </Td> </Tr> <Tr> <Th> Ownership </Th> <Td> Tom Gores </Td> </Tr> <Tr> <Th> Affiliation (s) </Th> <Td> Grand Rapids Drive </Td> </Tr> <Tr> <Th> Championships </Th> <Td> 3 (1989, 1990, 2004) </Td> </Tr> <Tr> <Th> Conference titles </Th> <Td> 7 Western: 2 (1955, 1956) Eastern: 5 (1988, 1989, 1990, 2004, 2005) </Td> </Tr> <Tr> <Th> Division titles </Th> <Td> 9 (1988, 1989, 1990, 2002, 2003, 2005, 2006, 2007, 2008) </Td> </Tr> <Tr> <Th> Retired numbers </Th> <Td> 11 (1, 2, 3, 4, 10, 11, 15, 16, 21, 32, 40) </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.nba.com/pistons </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> Home </Td> <Td> Away </Td> </Tr> <Tr> <Td> Third </Td> <Td> Fourth </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Detroit Pistons </Th> </Tr>

When was the last time the pistons won a championship