The Grüneburgpark is a park in the Westend district of Frankfurt, whose name derives from the "Green castle", which stood on the site in the 14th century. In 1789 the banker Peter Heinrich von Bethmann Metzler acquired the property and designed the park. In the following years the great thinkers of the day met here, among them Johann Wolfgang von Goethe and Bettina von Arnim.