The town consists of the three villagesUnteruhldingen, Oberuhldingen und Mühlhofen. Further, the hamlets of Seefelden, Maurach, Obermaurach, Gebhardsweiler and Hallendorf are included in the area of the commune.
Seefelden, Maurach and the cathedral of Birnau around 1809Aerial view of Uhldingen-Mühlhofen withLake Constance and the islandMainau in the background
Archeological finds show that the shore of Lake Constance nearUnteruhldingen was already inhabited during theNeolithic andBronze ages. During the time of theRoman Empire there may have been a port, as the discovery of coins from the 1st century AD suggests. Oberuhldingen is situated at a Roman road fromMeersburg to the valley ofSalem (Baden) where remains of a Roman estate have been found.
The parish of Seefelden was possibly founded already in the 7th century and, along with Bermatingen, Aufkirch undReichenau Monastery, is one of the first churches of the northern Lake Constance area. Thus it may have been witness to the first Christian conversions through theFrankish Empire. (Official documents mention it for the first time in 1165.) It was subject to theBishop of Constance.
The name Uhldingen was mentioned for the first time in documents from 1058 as Oweltinga/Ouweltingen; later the names Uoldingen and Ueldingen were used. The town carries the name of the eldestOwalt fromAlemannic times. Mühlhofen was first mentioned in 1165 as Mulnhoven.
For the year 1175 a document byFrederick Barbarossa states the existence of ship traffic between Unteruhldingen andKonstanz.
In the 12th centurySalem Abbey began targeted property purchases in Uhldingen and the surrounding area. Presumably in Seefelden a monastery was founded in 1227, which belonged to Salem. A few years later it was moved toBaindt.
In 1348 the plague devastated the area.
At the hill of Zihlbühl, in the Knappenhöhle cave, medieval efforts to dig forgold were only scarcely successful.
On the lower Lichtenberg there was acastle which was destroyed in 1499 during the Swabian War. It was the residence of the lord of Oberrieden.
Salem area around 1765.
From 1264 the villages Oberuhldingen, Mühlhofen and Seefelden belonged to the territory ofSalem Abbey. Unteruhldingen was on the neighbouring territory of the county ofHeiligenberg, which became part of thePrincipality ofFürstenberg in 1516.
The port villages of Maurach and Unteruhldingen were hubs for goods from the Salem valley and for salt, which were imported by Salem from their own salt mines. A sunk salt ship still lies on the bottom of the lake in front of modern Unteruhldingen harbour. The Bishop of Constance also owned land here. From 1733 Uhldingen harbour was the main port of the county of Heiligenberg.
Aftersecularization in 1803/1804, the villages of Oberuhldingen, Unteruhldingen and Mühlhofen were given to theMargraviate of Baden and became independent towns.
From 1939 until the county reform of 1973 they belonged to the county ofÜberlingen. Since then, they are part of theBodenseekreis. On 1 January 1972, Unteruhldingen, Oberuhldingen and Mühlhofen were united into the commune of Uhldingen-Mühlhofen.
The coat of arms of Uhldingen-Mühlhofen symbolises the flourishing of the three member villages with three whiteroses on a red background. The three segments with blue waves on a white background represent Lake Constance and theSeefelder Aach, which flows from Salem valley through the territory of the commune into the lake.
Around 12 km2 of the commune's territory are still used agriculturally dominated byorchards andvineyards.A part of the working population commutes into the nearby cities likeÜberlingen andFriedrichshafen. In the town itself people work predominantly in middle class professions. There has been a continuing trend from a producing to the service sector. In particular, tourism plays an important role.
Uhldingen-Mühlhofen is on theBundesstraßeB 31 about 7 km east ofÜberlingen and 3 km west ofMeersburg. The holiday resort of Unteruhldingen is located distant from the Bundesstraße at the less used Meersburger Straße near the shore of the lake.
The town can also be reached by trains of theDeutschen Bahn AG on theStahringen–Friedrichshafen railway. The train station is in Oberuhldingen. A bus line connects it toSalem and other neighbouring towns and holiday destinations.
From the lake Uhldingen-Mühlhofen can be reached by the ships ofBodensee-Schiffsbetriebe. In particular, there is a connection to the island ofMainau.
Parallel to the shore is a cycling path from Meersburg to Unteruhldingen, through the protected natural reserve near Seefelden and on to Überlingen.
The Pfahlbauten open-air museum inUnteruhldingen displays archeological finds and reconstructions of Neolithic and Bronze Age pile dwellings. The buildings are idealized reconstructions from between the 1922 and 1941, which were designed based on digs of theWasserburg Buchau atFedersee. After 1945 the museum was led by the controversial archeologistHans Reinerth, one of the leadingNazi archaeologists of theAmt Rosenberg. This museum has been expanded since to incorporate modern research.
The baroqueCastle Maurach below the cathedral once served the monastery as a port and as summer residence for the abbots. Today it is used as a conference centre.
Moreover, there are the parish church of St Martin in Seefelden whose tower is from the 12th century. The new gothic altar is from the year 1912 and depicts the life ofSt Martin of Tours; theconfessionals were carved inJoseph Anton Feuchtmayer's workshop and were in Birnau until 1806.
The chapel of Unteruhldingen is from the year 1505. It has a baroque altar, which was original in Seefelden, as well as a number of wood carvings from the time of its foundation. The historical Unteruhldingen town hall, once the bath house, is also from this era.
In the Chapel of St Wolfgang Oberuhldingen also possesses a historical attraction from the 16th century. The abbot of Salem, Stephan I. Jung had her decorated in 1711 in baroque style. The altar shows a view of Salem Abbey.
About 200 metres east of the cathedral of Birnau, just above the B31, is the monument and a cemetery for inmates of aconcentration camp who died during the construction ofGoldbach Tunnels.