The name of the municipality stems from the Augustinian monastery Crucelin, laterKreuzlingen Abbey. It was founded in 1125 by the Bishop of Constance Ulrich I. In the Swabian War and the 30 Years' War after the siege of Constance by Swedish troops, the Augustinian monastery was burned down by the people of Constance, who blamed the monks for having supported the enemy. In 1650, the monastery was rebuilt in its present location. With secularization in 1848, the buildings became a teachers' school. The chapel became a Catholic church
The area was already settled during the Bronze Age. Celtic and Roman coins and artifacts testify of continued settlement. Kurzrickenbach is first mentioned as Rihinbahin 830, Egelshofen as Eigolteshoven in 1125, and Emmishofen as Eminshoven in 1159. The territory of the municipality, except for the Augustinian monastery, belonged to the Bishop of Constance. When the Eidgenossen conquered Thurgau in 1460 and further with the Reformation, the ties to the neighboring city loosened.
Until the beginning of the 19th century, the present center of Kreuzlingen was still largely agricultural. The first steamboats began to operate on Lake Constance in 1824. The first train line to Romanshorn was finished in 1871, and the second to Etzwilen in 1875. This brought commerce and industry to the region. In 1874, Kreuzlingen became the capital of the district, instead of Gottlieben. However, until World War I, Kreuzlingen was a kind of suburb of Constance. Most of its industry was in the hands of German firms. The war made Kreuzlingen more independent.
The Sanatorium of Bellevue (1857�1980), which occupied part of the old monastery, played an important role in the history of Kreuzlingen. In 1842, Ignaz Vanotti from Constance bought a large tract of land and built a residential and commercial building in 1843 to house the emigrant press of Bellevue, which had previously been located in R�merburg. In 1857, Ludwig Binswanger, a
