Runestone U 133 (location) is in style Pr3, part of the more general Urnes style. The stone has been split into two parts that are walled into the southern exterior wall of Täby church, near the ground. The larger fragment, which was originally the upper part of the runestone, is in the western wall of the old porch which is constructed at the church's southern side. The smaller fragment is upside-down in the southern wall of the porch. Both fragments are partly in the soil which means that it is necessary to remove some soil in order to read the entire inscriptions. The larger part was known as early as Johannes Bureus (1568–1652) and it was also studied by Johan Peringskiöld during the national search for historic monuments (1667–84) and by Olof Celsius in 1727. However, the smaller part was not noticed by scholars until 1857, when it was documented by Richard Dybeck, who initially believed that the parts did not belong together. He corrected this interpretation in his "Sverikes runurkunder" (1865) where he made a depiction of how they would have looked before they were split.