<Tr> <Td_colspan="2"> A view of Harappa's Granary and Great Hall </Td> </Tr> <Tr> <Td_colspan="2"> Shown within Punjab, Pakistan Shown within Punjab, Pakistan Show map of Punjab, Pakistan Show map of Pakistan Show all </Td> </Tr> <Tr> <Th> Location </Th> <Td> Sahiwal District, Punjab, Pakistan </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 30 ° 37 ′ 44" N 72 ° 51 ′ 50" E ﻿ / ﻿ 30.62889 ° N 72.86389 ° E ﻿ / 30.62889; 72.86389 Coordinates: 30 ° 37 ′ 44" N 72 ° 51 ′ 50" E ﻿ / ﻿ 30.62889 ° N 72.86389 ° E ﻿ / 30.62889; 72.86389 </Td> </Tr>

When was the city of harappa discovered and by who