It was built in the castle's grounds in 1823 by Landgräfin Elisabeth, daughter of George III the United Kingdom, for her husband Frederick VI, Landgrave of Hesse-Homburg, with the foundation stone laid on 17 April that year.
Construction was overseen by Georg Moller, but was stopped permanently after scaffolding collapsed on 9 November 1823, burying and injuring eight workers, one of whom later died of his injuries.
Wilhelm II of Prussia sold it to a restaurant owner but still wanted it "secure as a monument", for reasons that remain unclear.
The Gothic House was listed as a historic monument in 1977 "at the last minute"[4] and in 1980 the building passed to a property management company in Frankfurt after the Lipinskis went bankrupt.
[5]) The museum houses many temporary exhibitions and permanent displays on the history, art, fashion, coinage and hat-industry of the town, its spa and the landgraviate as a whole, including the "Hutmuseum", centred on the Homburg hat.