Homburg , (Ger. also Homburg tor der Hohe, at the height), a town of Prussia, capital of the circle of Upper Taunus in the province of Hesse-Nassau, 9 m. N. N. W. of Frankfort; pop. in 1871, 8,626. It derives its name from being situated on and near the heights of the mountain ridge of Taunus. The principal buildings are a castle, built in 1680 and renovated in 1835, a library, a picture gallery, and a Protestant church. The town is a celebrated watering place, but owes much of its reputation to the former existence of an authorized gambling house. The government of the landgraviate concluded in 1840 a contract with the brothers Louis and Francois Blanc of Paris, permitting them to keep open bank, in return for building a Kursaal at a cost of $100,-000, and a high annual rent. At the expiration of the contract in 1870 the Prussian government refused to renew it and prohibited the further existence of gambling houses. There are four ferruginous and two saline springs, which contain more carbonic acid than any other mineral water known. (See Hessehomburg.)