By the time of the Roman Empire, about 1 AD, many people in Northern Europe were living under Roman rule, and their buildings began to look more and more like Roman buildings from other parts of the Roman Empire. At Trier, for example, the Roman army built a stone bridge over the Mosel river, a large bath building, a fort, and a basilica. Even outside the area held by Rome, people began to build stone buildings in the Roman style.
But most people still lived in rectangular wooden houses. A normal Saxon house from Tofting on the North Sea from about 300 AD has two rows of wooden posts running down the middle to hold up the roof. The outer walls are still of wattle and daub. One end of the longhouse was for people to live in, and the other end was for the cows and sheep and pigs.