<Table> List of European Cup and UEFA Champions League finals <Tr> <Td_colspan="2"> European Cup / Champions League trophy </Td> </Tr> <Tr> <Th> Founded </Th> <Td> 1955 </Td> </Tr> <Tr> <Th> Region </Th> <Td> Europe (UEFA) </Td> </Tr> <Tr> <Th> Number of teams </Th> <Td> 32 (group stage) 2 (finalists) </Td> </Tr> <Tr> <Th> Current champions </Th> <Td> Real Madrid (12th title) </Td> </Tr> <Tr> <Th> Most successful club (s) </Th> <Td> Real Madrid (12 titles) </Td> </Tr> <Tr> <Td_colspan="2"> 2017--18 UEFA Champions League </Td> </Tr> </Table> <Tr> <Td_colspan="2"> European Cup / Champions League trophy </Td> </Tr>

How many times have atletico madrid won the champions league
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