The Dane John is a park in Canterbury which has been used by the citizens of Canterbury since at least the C12th.
Dane John is a corruption of the Norman French word "donjon" meaning the motte or central tower of a castle - the same word that also became "dungeon" in English. The park is nearby the Norman Canterbury Castle (q.v.)
Alderman Simmons was responsible for laying out the park in its present form in 1790 - as the plaque on the memorial states:
"This field and hill were improved and these terraces, walks and plantations, made in the year 1790 for the use of the public, at the sole expense of James Simmons, Esq. of this city, Alderman and Banker"
TR1457 : Canterbury The building is known as "the old weavers house". Built in 1507, it takes its name from the Flemish and Hugenot weavers who fled from France to escape religous persecution in the 16th and 17th Centuries. The Flemish refugees were welcomed by Elizabeth I who gave them the right to trade in Canterbury. She also offered them a special place of worship in the Cathedral, and a Hugenot chapel is still there today.