<Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 9 </Td> <Td_colspan="1"> March 3, 2013 (2013 - 03 - 03) </Td> <Td> April 28, 2013 (2013 - 04 - 28) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 10 </Td> <Td_colspan="1"> February 27, 2014 (2014 - 02 - 27) </Td> <Td> May 1, 2014 (2014 - 05 - 01) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 10 </Td> <Td_colspan="1"> February 19, 2015 (2015 - 02 - 19) </Td> <Td> April 23, 2015 (2015 - 04 - 23) </Td> </Tr>

Where does the tv show vikings take place