Kaiser-Wilhelms-Bad, Bad Homburg vor der Höhe, Historic spa building in Bad Homburg vor der Höhe, Germany.

Kaiser-Wilhelms-Bad is a thermal spa building in Bad Homburg vor der Höhe featuring high-ceilinged rooms decorated with elaborate tiles and mosaics. The three-wing structure combines classical architectural elements typical of late 19th-century spa design.

The building was constructed between 1887 and 1890 by architect Louis Jacobi as a modern spa during the founding era. In its early years, the spa welcomed prominent guests including Prince Albert Edward and Otto von Bismarck.

The bronze monument to Kaiser Wilhelm I stands in front of the entrance, not inside. It is 3.50 metres tall, made by Fritz Gerth and unveiled on 10 September 1905 in the presence of the imperial family; its base is Swedish red granite. The building itself is still run by Kur- und Kongreß-GmbH – Kur-Royal.

The Kaiser-Wilhelms-Bad stands in the Kurpark, directly beside the Spielbank and near the Elisabethenbrunnen. The bronze monument to Wilhelm I, 3.50 metres tall on a Swedish red granite base, faces the entrance. The building has been run for years by Kur- und Kongreß-GmbH – Kur-Royal.

King Chulalongkorn of Siam took a diet cure here from 15 August to 22 September 1907, and a spring was later named after him. A report notes that on 20 September 1907 his 54th birthday was celebrated in Bad Homburg, and the king had the spring enclosed in a splendid pavilion as a memorial to a generous monarch.