In the 13th century St. Mary`s Church, Sir Ingram Hopton, Cromwell`s adversary at the Battle of Winceby, was buried, and Alfred Lord Tennyson was married.
There was a Roman settlement here, and the remains of the Roman wall can be seen in several places.
A canal, promoted by local man Sir Joseph Banks, opened in 1802.
There was a famous ten day annual Horse Fair here until 1948.
Today the town is best known as an antiques centre.
Blue Badge Guide Colin Crosby is available to lead Guided Walks around Horncastle for groups.