coat of arms, which is of 1664. Until 1851, the building also housed the Krone-Post hotel, which coincided with being a station of the Thurn und Taxis postal company. It has housed many notable persons. Thus the so-called "Napoleon Window" with its "N" painted on reminds of the stay of French emperor Napoleon Bonaparte in 1805. According to legend, he rammed his head so hard it bled on this window, when he was startled by the noise of his soldiers ridiculing the "Spy of Aalen". The building was used as Aalen's town hall from 1907 until 1975. Today it houses a cabaret café and the stage of the Theatre of the Town of Aalen. The town has adopted the Wischau Linguistic Enclave Society due to their godparenthood and stores their traditional costumes in the building. Bürgerspital The Bürgerspital ("Civic Asylum") is a timber-frame house erected on Spritzenhausplatz ("Fire Engine House Square") in 1702. Until 1873, it was used as civic hospital, then, later as a retirement home. After a comprehensive renovation in 1980 it was turned into a senior citizen's community centre. Limes-Thermen On a slope of the Langert mountain, south of the town, the Limes-Thermen ("Limes Thermae") hot springs are located. They were built in ancient Roman style and opened in 1985. The health spa is supplied with water about . Market square The market square is the historic hub of Aalen and runs along about from the town hall in the south to the Historic Town Hall and the Old Town Hall in the north, where it empties into Radgasse alley. Since 1809, it is site of the weekly market on Wednesday and Saturday. About in front of the Reichsstädter Brunnen fountain at the town hall, the coats of arms of Aalen, its twinned cities and of the Wischau linguistic enclave are paved into the street as mosaic. Market fountain In 1705, for the water supply of Aalen a well casing was erected at the northern point of the market square, in front of the Historic Town Hall. It was a present of duke Eberhard Louis. The fountain bore a statue of emperor Joseph I., who was enthroned in 1705 and in 1707 renewed Aalen's Imperial City privileges. The fountain was supplied via a wooden pipe. Excessive water was dissipated through ditches branched from Kocher river. When in the early 1870s Aalen's water network was constructed, the fountain