The oldest part of the church is the tower. It used to be a defense tower - look at the entrance door on the second floor.... Legend says that the tombs just outside the church are the graves of Olof Skötkonung and his queen, but they are at least a hundred years younger. The left one is richly ornamented, and also has some runes on it. If you move the cursor over the upper pictures, you'll see more, and if you click on the bottom ones, you'll get inside the church + you'll see some rune stones. Here's a link to a site that will tell you more about this place.