The so called Blue Pig inn is a public house in Grantham, a small town in Lincolnshire, England. It is one of the oldest surviving buildings in the town before the great fire of 1660. It is one of the last remaining tudor houses in the town. Its current name - and usage as a pub it received in the 19th century, before that it was a regular house.

The building dates from around the 16th century and was modified over the time. at one point its timber framing was covered which was revealed again in the 1930s.

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