Bagnato, in the style of the transitional period from Baroque to Classic. Since 1936/37, it has been protected under the Baden State Building ordinance. The Franciscan church was built in 1348 in the Romanesque style, and in the early 18th century, converted to a Baroque style. It was renovated in the 1990s. The Chapel of St Michael (Aufkirch), outside of the city, was built in 1000, and was the city's first parish church. It and the village were severely damaged in the 1634 siege. Geologic anomalies Überlingen's location on the eastern Swiss plateau places it at the end of glacial moraine of the second ice age. The glaciers of the last ice age cut through the region as well, creating a mixture of moraine and glacial cuts, the deepest of which runs through the old forests at Hödingen to the lake. The combination of glacial carving, moraine, and erosion have created several unique geologic formations. Teufelstisch Teufelstisch, or The Devil's Table, is a feldspar needle 20–22 meters in diameter, located approximately 80 meters from the southwestern shoreline of the Überlingen Lake, between Überlingen and Wallhausen. Between 1975 and the early 1990s, several divers experienced Caisson's syndrome after diving at the needle. In the 1990s, the deaths of several experienced divers, and the disappearance of two of them, resulted in a diving ban in the vicinity of the needle. Spetzgart The area immediately to the west of Überlingen is known as the Spetzgart, due to its jointed tower formations. The name reflects the region's complex Alemannic language traditions: Spetz (or spitz, meaning point) and Gart (or Garten, meaning garden). The Spetz are an example of the geologic processes that shaped the eastern regions of the Swiss plateau. One can also see the geologic molasse created in the Jurassic and Cretaceous periods. This area is a protected Natural area (see below). Protected areas In Überlingen and its surrounding environs, there are, as of April 2009, three Rural Parks and four Nature Areas, protected by law. Protected Natural Areas The Aach Ravine, 72 hectares (ha), the Hödinger Ravine (28 ha) between Hödingen and Sipplingen, the Katharine Rocks (4 ha) and Spetzgarten Ravine (12 ha) between Goldbach und Spetzgart. Climate Despite its distance from an ocean, Überlingen has, depending on the definition used, an oceanic climate (Köppen Cfb), with four distinct seasons. The climate is generally mesothermal with seasonal variations. According to the Köppen