All Saints Church was rebuilt in the 18th century, retaining its fine mediaeval tower.
The former Holy Trinity Church is now an arts centre.
Gainsborough Old Hall is an outstanding timber framed manor house dating from the 15th century, with a slightly later brick tower. It contains a mediaeval kitchen and a Great Hall. Richard III and Henry VIII both stayed here.
Alfred`s wife Ealswith came from Gainsborough.
Sweyn Forkbeard made Gainsborough his headquarters on his campaign of conquest which culminated in his becoming King of England. He died at Gainsborough and was initially buried in the town, before being moved to Denmark.
The bore on the River Trent here is known locally as the Aegre. Some believe that it was here that Cnut, son of Sweyn, commanded the waves.
George Eliot`s "The Mill on the Floss" is set in Gainsborough, under the name St. Oggs.
Among those born in Gainsborough are John Alderton, actor; Vic Feather, trade union leader; and Sybil Thorndyke, actress.
Blue Badge Guide Colin Crosby is available to lead Guided Walks around Gainsborough for groups.