was replaced by a smaller fountain about distant. In 1975, the old market fountain was re-erected in baroque style. It bears a replica of the emperor's statue, with the original statue exhibited in the new town hall's lobby. The cast iron casing plates depict the 1718 coat of arms of the Duchy of Württemberg and the coats of arms of Aalen and of the merged municipalities. Reichsstädter Brunnen The Reichsstädter Brunnen fountain ("Imperial Civic Fountain") is located in front of the town hall at the southern point of the market square. It was created by sculptor Fritz Nuss in 1977 to commemorate Aalen's time as an Imperial City (1360–1803). On its circumference is a frieze showing bronze figurines illustrating the town's history. Radgasse The Radgasse ("Wheel Alley") features Aalen's oldest façade. Originally a small pond was on its side. The buildings were erected between 1659 and 1662 for peasants with citizenry privileges and renovated in the mid-1980s. The namesake for the alley was the "Wheel" tavern, which was to be found at the site of today's address Radgasse 15. Tiefer Stollen The former iron ore pit Wilhelm at Braunenberg hill was converted into the Tiefer Stollen tourist mine in order to remind of the old-day miners' efforts and to maintain it as a memorial of early industrialisation in the Aalen area. It has a mining museum open for visitors, and a mine railway takes visitors deep into the mountain. The Town of Aalen, a sponsorship association, and many citizens volunteered several thousand hours of labour to put the mine into its current state. As far as possible, things were left in the original state. In 1989, a sanitary gallery was established where respiratory diseases are treated within rest cures. Thus the Aalen village of Röthard, where the gallery is located, was awarded the title of "Place with sanitary gallery service" in 2004. Observatory The Aalen Observatory was built in 1969 as school observatory for the Schubart Gymnasium. In 2001, it was converted to a public observatory. Since then, it has been managed by the Astronomische Arbeitsgemeinschaft Aalen ("Aalen Astronomical Society"). It is located on Schillerhöhe hill and features two refractive telescopes. They were manufactured by Carl Zeiss AG which has its headquarters in nearby Oberkochen and operates a manufacturing works in Aalen (see below). In the observatory, guided tours and lectures are held regularly. Windpark Waldhausen The Windpark Waldhausen wind