no evidence of agriculture or permanent settlements have been found. An Early Bronze Age grave in Foribach in Kerns implies that there was a settlement in the surrounding area between 2000 BC and 1700 BC. There may have also been a settlement along the shores of Lake Sarnen during the same period. Between 1500 and 1100 BC there were several other settlements, including houses in the Rengg Pass and high alpine herding camps above the pass. Many of the place names in the canton have Celtic or Gallo-Roman roots. In 1914-15 a Roman estate was unearthed in Alpnach. The estate was built in the late 1st century AD and remained in operation until a fire destroyed the main building in 270. Around 700, the Alamanni began to migrate into Obwalden. They initially settled around the lakes while the Gallo-Romans lived up on the plateau. The Alamanni influence is noticeable around Lake Sarnen and the Kerns plateau where many place name end in -ingen, -wil and -hofen. The Gallo-Romans remained around Mt. Pilatus, the Giswilerstock and in the Melch valley. During the 8th to 11th centuries, the two populations intermarried and eventually all became Germanized. By the 9th century it was part of the Second Kingdom of Burgundy. It became part of the Holy Roman Empire following the winter military campaign of 1032-33 by Emperor Conrad II. Obwalden was given to the Counts of Lenzburg from Aargau. The counts built a castle on Landenberg hill to help them control the land. Early middle ages During the Early Middle Ages, much of the land in Obwalden was controlled by monasteries (especially Murbach-Lucerne and Beromünster Abbey). The monasteries began to spread their authority and parishes into Obwalden during this time. St. Peter's Church in Sarnen was first mentioned in 1036, but was built on top of an 8th-century church. St. Mary's Church of Alpnach was probably built in the 8th or 9th century. The churches in Kerns, Sachseln, and Giswil all became parish churches by the 12th century and a church was mentioned in Lungern in 1275. During the 14th century, Engelberg Abbey began to acquire rights over the parishes in Obwalden. By 1415 the Abbey had de facto control over the appointment of parish priests in the entire valley. In 1460, this became de jure authority over all the parishes in the valley. In the early 12th century the Counts of Lenzburg