when was it constructed?
1 October 1868
St Pancras railway station
 Following the station's opening on 1 October 1868, the MR constructed the Midland Grand Hotel on the station's façade, which has been widely praised for its architecture and is now a Grade I listed building along with the rest of the station.
is london st pancras international the same as kings cross No, they both are different stations. where is the main station located? It is a central London railway terminus on Euston Road in the London Borough of Camden.
wiki:12131739
St Pancras railway station [SEP] Introduction
By the 1960s, St Pancras was surplus to requirements and services were diverted to King's Cross and but there was fierce opposition to its proposed closure and demolition of the station and hotel. In the late 20th century, it became the terminal for the Channel Tunnel Rail Link as part of an urban regeneration plan across East London. The complex underwent an £800 million refurbishment which was opened by Queen Elizabeth II in November 2007. A security-sealed terminal area was constructed for Eurostar services to mainland Europe via High Speed 1 and the Channel Tunnel, with platforms for domestic trains to the north and south-east of England.